[{"id":"common-language","value":"polski","attributes":{}},{"id":"common-footer-about","value":"Sklep internetowy Wasserman to firma z wieloletnim doświadczeniem, działająca na rynku już od 1996 roku. Swoim klientom oferujemy szeroki wybór asortymentu z zakresu urządzeń elektronicznych. Gwarantujemy wysyłkę „od ręki”, ponieważ wszystkie produkty, jakie są widoczne na stronie posiadamy w naszych magazynach. Zależy nam na rozwoju, dlatego ciągle poszerzamy dostępny asortyment. Możemy pochwalić się doświadczeniem we współpracy zarówno z klientami indywidualnymi jak i firmami, na terenie całej Unii Europejskiej. Zapewniamy profesjonalną obsługę każdego klienta oraz szybką i bezproblemową realizację zamówień. Wasserman - wszystko dla wszystkich!","attributes":{}},{"id":"common-added-product-to-cart","value":"Produkt został dodany do koszyka","attributes":{}},{"id":"common-product-is-unavailable","value":"Produkt jest niedostępny","attributes":{}},{"id":"common-cart-is-empty","value":"Koszyk jest pusty","attributes":{}},{"id":"common-categories","value":"Kategorie","attributes":{}},{"id":"common-search-box-placeholder","value":"Czego dziś szukasz?","attributes":{}},{"id":"common-footer-copyright","value":"Wszelkie prawa zastrzeżone dla Wasserman.eu","attributes":{}},{"id":"common-logo-link-title","value":"Wasserman.eu - Wszystko dla Wszystkich","attributes":{}},{"id":"common-footer-dealers","value":"Handlowcy","attributes":{}},{"id":"common-footer-contact","value":"Kontakt","attributes":{}},{"id":"common-footer-email","value":"Kontakt e-mail:","attributes":{}},{"id":"common-footer-helpline","value":"Infolinia:","attributes":{}},{"id":"common-footer-helpline-hours","value":"Od poniedziałku do piątku 08:00 - 16:00","attributes":{}},{"id":"common-footer-returns","value":"Reklamacje i zwroty:","attributes":{}},{"id":"common-footer-returns-btn","value":"Zgłoś zwrot lub reklamację","attributes":{}},{"id":"common-footer-pickup","value":"Odbiór osobisty","attributes":{}},{"id":"common-footer-pickup-hours","value":"Poniedziałek - piątek 08:00 - 16:00
Sobota 10:00 - 14:00","attributes":{}},{"id":"common-footer-bank-account-h","value":"Numer konta bankowego:","attributes":{}},{"id":"common-potd","value":"Produkt dnia","attributes":{}},{"id":"common-till-promo-end","value":"Do końca promocji:","attributes":{}},{"id":"common-homepage","value":"Strona główna","attributes":{}},{"id":"common-add-to-cart","value":"Do koszyka","attributes":{}},{"id":"common-cart-dialog-h","value":"Twój koszyk","attributes":{}},{"id":"common-value-remaining-for-free-delivery-l","value":"Do darmowej dostawy brakuje:","attributes":{}},{"id":"common-cart-sum-l","value":"Wartość koszyka:","attributes":{}},{"id":"common-continue-shopping-btn","value":"Kontynuuj zakupy","attributes":{}},{"id":"common-go-to-checkout","value":"Do kasy","attributes":{}},{"id":"common-cart-item-added","value":"Dodano produkt do koszyka","attributes":{}},{"id":"common-cart-items-unit-price","value":"za sztukę","attributes":{}},{"id":"common-item-quantity-increase","value":"zwiększ","attributes":{}},{"id":"common-item-quantity-decrease","value":"zmniejsz","attributes":{}},{"id":"common-cart-item-remove","value":"usuń przedmiot","attributes":{}},{"id":"common-auth-sign-in-h","value":"Zaloguj się","attributes":{}},{"id":"common-auth-sign-up-h","value":"Utwórz konto","attributes":{}},{"id":"common-auth-sign-in-google","value":"Zaloguj się z Google","attributes":{}},{"id":"common-auth-sign-in-facebook","value":"Zaloguj się z Facebookiem","attributes":{}},{"id":"common-auth-sign-up-google","value":"Zarejestruj się z Google","attributes":{}},{"id":"common-auth-sign-up-facebook","value":"Zarejestruj się z Facebookiem","attributes":{}},{"id":"common-auth-error-h","value":"Błąd logowania","attributes":{}},{"id":"common-auth-error-p","value":"Wystąpił problem. Prosimy spróbować ponownie.","attributes":{}},{"id":"common-auth-cannot-register-new-user","value":"Nie można zarejestrować konta","attributes":{}},{"id":"common-validation-field-required","value":"Pole wymagane","attributes":{}},{"id":"common-auth-validation-invalid-email","value":"Niepoprawny e-mail","attributes":{}},{"id":"common-auth-validation-pass-too-short","value":"Wymagane minimum 6 znaków","attributes":{}},{"id":"common-sign-up-first-name-l","value":"Imię","attributes":{}},{"id":"common-sign-up-last-name-l","value":"Nazwisko","attributes":{}},{"id":"common-sign-up-email-l","value":"Adres e-mail","attributes":{}},{"id":"common-sign-up-password-l","value":"Hasło","attributes":{}},{"id":"common-sign-up-tos-accept","value":"Akceptuję regulamin sklepu oraz politykę prywatności","attributes":{}},{"id":"common-sign-up-confirm-btn","value":"Utwórz konto","attributes":{}},{"id":"common-sign-in-email-l","value":"Adres e-mail","attributes":{}},{"id":"common-sign-in-password-l","value":"Hasło","attributes":{}},{"id":"common-sign-in-btn","value":"Zaloguj się","attributes":{}},{"id":"common-auth-reset-password-btn","value":"Nie pamiętam hasła","attributes":{}},{"id":"common-auth-sign-in-invalid-credentials-p","value":["Wprowadzono nieprawidłowe dane logowania.","\n","Możesz zresetować hasło klikając \"Nie pamiętam hasła\""],"attributes":{}},{"id":"common-auth-sign-in-invalid-credentials-h","value":"Błędny login lub hasło","attributes":{}},{"id":"common-auth-or-sign-in","value":"zaloguj się","attributes":{}},{"id":"common-auth-or-sign-up","value":"utwórz konto","attributes":{}},{"id":"common-unknown-error-p","value":"Wystąpił błąd wewnętrzny.","attributes":{}},{"id":"common-password-reset-dialog-h","value":"Nie pamiętasz hasła?","attributes":{}},{"id":"common-password-reset-email-sent","value":"Wysłaliśmy do Ciebie e-mail na adres:","attributes":{}},{"id":"common-password-reset-request-info","value":"Podaj swój e-mail, jeśli mamy go w systemie, wyślemy Ci link do zmiany hasła.","attributes":{}},{"id":"common-password-reset-email-l","value":"Adres e-mail","attributes":{}},{"id":"common-password-reset-request-btn","value":"Wyślij","attributes":{}},{"id":"common-error-heading","value":"Przepraszamy","attributes":{}},{"id":"common-error-page-not-found-p","value":"Nie możemy odnaleźć tej strony.","attributes":{}},{"id":"common-error-page-not-found-p2","value":"Wygląda na to, że strona została przeniesiona lub usunięta.
Skorzystaj z wyszukiwarki aby znaleźć interesujące Cię produkty.","attributes":{}},{"id":"common-error-return-to-homepage-btn","value":"powrót do strony głównej","attributes":{}},{"id":"common-meta-title-suffix","value":"| Sklep internetowy Wasserman.eu","attributes":{}},{"id":"common-meta-title-suffix-short","value":"| Wasserman.eu","attributes":{}},{"id":"common-product-badge-bundle","value":"Zestaw","attributes":{}},{"id":"common-product-badge-new","value":"Nowość","attributes":{}},{"id":"common-product-card-img-alt","value":[{"type":"var","name":"product"}," w sklepie Wasserman.eu"],"attributes":{}},{"id":"common-cookie-p","value":"Używamy ciasteczek, dzięki którym strona działa poprawnie.","attributes":{}},{"id":"common-cookie-accept-btn","value":"Akceptuję","attributes":{}},{"id":"common-newsletter-popup-h","value":"Promocje, nowości, konkursy, rabaty..","attributes":{}},{"id":"common-newsletter-popup-thank-you","value":"Dziękujemy","attributes":{}},{"id":"common-newsletter-popup-h2","value":"Zapisz się do naszego newslettera i bądź na bieżąco!","attributes":{}},{"id":"common-newsletter-popup-email-l","value":"Twój adres e-mail","attributes":{}},{"id":"common-newsletter-popup-sign-up-btn","value":"Zapisz się","attributes":{}},{"id":"common-newsletter-popup-legal-notice","value":"Oświadczam, że wyrażam zgodę na przetwarzanie danych osobowych przez administratora danych, którym jest Krzysztof Wasilewski prowadzący działalność gospodarczą pod firmą: Krzysztof Wasilewski WASSERMAN, ul. Strumykowa 14, 72-320 Trzebiatów, NIP: 8571068449 w celach marketingowych, na komunikowanie się w celu informowania o promocjach i konkursach, oraz na przekazanie moich danych osobowych do FreshMail Sp. z o.o. Al. 29 Listopada 155 c, 31-406 Kraków, NIP 6751496393 REGON 123040091 celem komunikowania się ze mną i informowania o promocjach i konkursach.","attributes":{}},{"id":"common-newsletter-popup-agreement-error","value":"Zgoda na otrzymywanie wiadomości jest wymagana","attributes":{}},{"id":"common-newsletter-popup-email-error","value":"Adres e-mail jest wymagany","attributes":{}},{"id":"common-newsletter-popup-sign-up-error","value":"Niestety coś poszło nie tak :(","attributes":{}},{"id":"common-newsletter-section-h","value":"Jesteś głodny nowości?","attributes":{}},{"id":"common-newsletter-section-btn","value":"Zapisz się do newslettera","attributes":{}},{"id":"common-user-panel-btn","value":"Moje konto","attributes":{}},{"id":"common-sign-out-btn","value":"Wyloguj się","attributes":{}},{"id":"common-header-user-sign-up","value":"Jesteś nowym klientem?
Załóż konto","attributes":{}},{"id":"common-header-user-sign-in","value":"Zaloguj się","attributes":{}},{"id":"common-product-listing-sort-by","value":"Sortuj według:","attributes":{}},{"id":"common-product-listing-sort-by-name-asc","value":"nazwa A-Z","attributes":{}},{"id":"common-product-listing-sort-by-name-desc","value":"nazwa Z-A","attributes":{}},{"id":"common-product-listing-sort-by-price-asc","value":"cena rosnąco","attributes":{}},{"id":"common-product-listing-sort-by-price-desc","value":"cena malejąco","attributes":{}},{"id":"common-product-listing-sort-by-newest","value":"nowości","attributes":{}},{"id":"common-product-listing-sort-by-relevance","value":"najlepsze wyniki","attributes":{}},{"id":"common-product-count","value":[{"type":"select","selector":{"type":"var","name":"productCount"},"variants":[{"key":{"type":"str","value":"one"},"value":[{"type":"var","name":"productCount"}," produkt"]},{"key":{"type":"str","value":"few"},"value":[{"type":"var","name":"productCount"}," produkty"]},{"key":{"type":"str","value":"many"},"value":[{"type":"var","name":"productCount"}," produktów"]}],"star":2}],"attributes":{}},{"id":"common-no-products-found","value":"Brak produktów","attributes":{}},{"id":"common-new-products-h","value":"Nowości","attributes":{}},{"id":"common-clock-days","value":"dni","attributes":{}},{"id":"common-clock-hours","value":"godz","attributes":{}},{"id":"common-clock-minutes","value":"min","attributes":{}},{"id":"common-clock-seconds","value":"sek","attributes":{}},{"id":"common-promotions-h","value":"Promocje","attributes":{}},{"id":"common-show-all","value":"Pokaż wszystkie","attributes":{}},{"id":"common-header-cart-btn","value":"Koszyk","attributes":{}},{"id":"common-eligible-for-free-delivery-l","value":"Darmowa dostawa","attributes":{}},{"id":"common-locale-dialog-h","value":"Skonfiguruj ustawienia lokalizacji","attributes":{}},{"id":"common-locale-dialog-region","value":"Kraj dostawy","attributes":{}},{"id":"common-locale-dialog-language","value":"Język","attributes":{}},{"id":"common-locale-dialog-currency","value":"Waluta","attributes":{}},{"id":"common-locale-dialog-change","value":"Zmień","attributes":{}},{"id":"common-footer-delivery-options","value":"Partnerzy logistyczni","attributes":{}},{"id":"common-footer-payment-options","value":"Metody płatności","attributes":{}},{"id":"common-footer-find-us","value":"Znajdź nas","attributes":{}},{"id":"common-or","value":"lub","attributes":{}},{"id":"common-logout-ok","value":"Pomyślnie wylogowano.","attributes":{}},{"id":"common-country-AT","value":"Austria","attributes":{}},{"id":"common-country-BE","value":"Belgia","attributes":{}},{"id":"common-country-BG","value":"Bułgaria","attributes":{}},{"id":"common-country-HR","value":"Chorwacja","attributes":{}},{"id":"common-country-CZ","value":"Czechy","attributes":{}},{"id":"common-country-DK","value":"Dania","attributes":{}},{"id":"common-country-EE","value":"Estonia","attributes":{}},{"id":"common-country-FI","value":"Finlandia","attributes":{}},{"id":"common-country-FR","value":"Francja","attributes":{}},{"id":"common-country-DE","value":"Niemcy","attributes":{}},{"id":"common-country-GR","value":"Grecja","attributes":{}},{"id":"common-country-HU","value":"Węgry","attributes":{}},{"id":"common-country-IE","value":"Irlandia","attributes":{}},{"id":"common-country-IT","value":"Włochy","attributes":{}},{"id":"common-country-LV","value":"Łotwa","attributes":{}},{"id":"common-country-LT","value":"Litwa","attributes":{}},{"id":"common-country-LU","value":"Luxembourg","attributes":{}},{"id":"common-country-NL","value":"Holandia","attributes":{}},{"id":"common-country-PL","value":"Polska","attributes":{}},{"id":"common-country-PT","value":"Portugalia","attributes":{}},{"id":"common-country-RO","value":"Rumunia","attributes":{}},{"id":"common-country-SK","value":"Słowacja","attributes":{}},{"id":"common-country-SI","value":"Słowenia","attributes":{}},{"id":"common-country-ES","value":"Hiszpania","attributes":{}},{"id":"common-country-SE","value":"Szwecja","attributes":{}},{"id":"common-country-GB","value":"Wielka Brytania","attributes":{}},{"id":"common-country-GB-NIR","value":"Irlandia Północna","attributes":{}},{"id":"common-country-NO","value":"Norwegia","attributes":{}},{"id":"common-language-pl","value":"polski","attributes":{}},{"id":"common-language-en","value":"angielski","attributes":{}},{"id":"common-currency-PLN","value":"PLN - Złoty polski","attributes":{}},{"id":"common-currency-USD","value":"USD - Dolar amerykański","attributes":{}},{"id":"common-currency-EUR","value":"EUR - Euro","attributes":{}},{"id":"common-currency-GBP","value":"GBP - Funt szterling","attributes":{}},{"id":"common-currency-HUF","value":"HUF - Forint węgierski","attributes":{}},{"id":"common-currency-RON","value":"RON - Leja rumuńska","attributes":{}},{"id":"common-currency-BGN","value":"BGN - Lew bułgarski","attributes":{}},{"id":"common-currency-CZK","value":"CZK - Korona czeska","attributes":{}},{"id":"common-currency-DKK","value":"DKK - Korona duńska","attributes":{}},{"id":"common-currency-HRK","value":"HRK - Kuna chorwacka","attributes":{}},{"id":"common-currency-SEK","value":"SEK - Korona szwedzka","attributes":{}},{"id":"common-currency-NOK","value":"NOK - Korona norweska","attributes":{}},{"id":"common-feature-tile-1-h","value":"Darmowa dostawa","attributes":{}},{"id":"common-feature-tile-1-p","value":"Od 500 zł","attributes":{}},{"id":"common-feature-tile-1-url","value":"https://www.wasserman.eu/wysylka","attributes":{}},{"id":"common-feature-tile-2-h","value":"Rabaty","attributes":{}},{"id":"common-feature-tile-2-p","value":"Program rabatowy","attributes":{}},{"id":"common-feature-tile-2-url","value":"https://www.wasserman.eu/program-rabatowy","attributes":{}},{"id":"common-feature-tile-3-h","value":"14 dni na zwrot","attributes":{}},{"id":"common-feature-tile-3-p","value":"Bez podawania przyczyny","attributes":{}},{"id":"common-feature-tile-3-url","value":"https://www.wasserman.eu/regulamin-sklepu","attributes":{}},{"id":"common-registered-p","value":"Dziękujemy za rejestrację.","attributes":{}},{"id":"common-previous-page","value":"Poprzednia strona","attributes":{}},{"id":"common-next-page","value":"Następna strona","attributes":{}},{"id":"common-go-to-page","value":"Przejdź do strony","attributes":{}},{"id":"common-pagination-sr","value":["Strona ",{"type":"var","name":"page"}," z ",{"type":"var","name":"pageCount"}],"attributes":{}},{"id":"common-pagination-total","value":["z ",{"type":"var","name":"pageCount"}],"attributes":{}},{"id":"common-shipping-from-warehouse","value":["Wysyłka z magazynu: ",{"type":"var","name":"warehouse"}],"attributes":{}},{"id":"common-category-tree-h","value":"Podkategorie","attributes":{}},{"id":"common-return-to","value":"cofnij do","attributes":{}},{"id":"product-no-reviews-p","value":"Ten produkt nie ma jeszcze dodanych opinii.","attributes":{}},{"id":"product-review-anonymous-author","value":"Klient(ka) Wasserman","attributes":{}},{"id":"product-review-dialog-h","value":"Co sądzisz o tym produkcie?","attributes":{}},{"id":"product-review-dialog-done","value":"Dziękujemy za opinię.","attributes":{}},{"id":"product-review-form-name-l","value":"Twoje imię (opcjonalnie)","attributes":{}},{"id":"product-review-form-rating-error","value":"Prosimy o ocenę produktu","attributes":{}},{"id":"product-review-form-content-l","value":"Opinia o produkcie","attributes":{}},{"id":"product-review-form-submit-btn","value":"Dodaj opinię","attributes":{}},{"id":"product-availability-awaiting-delivery","value":"spodziewana dostawa","attributes":{}},{"id":"product-availability-running-out","value":"na wyczerpaniu","attributes":{}},{"id":"product-availability-medium-quantity","value":"średnia ilość","attributes":{}},{"id":"product-availability-high-quantity","value":"duża ilość","attributes":{}},{"id":"product-availability-on-request","value":"dostępny na zamówienie","attributes":{}},{"id":"product-availability-discontinued","value":"wycofany z oferty","attributes":{}},{"id":"product-availability-unknown","value":"brak informacji","attributes":{}},{"id":"product-buy-in-time-shipping","value":"Kup w ciągu","attributes":{}},{"id":"product-buy-in-time-shipping-2","value":", a wyślemy dzisiaj.","attributes":{}},{"id":"product-meta-description","value":[{"type":"var","name":"product"}," - Szukasz tego produktu? Znajdziesz go na Wasserman.eu!"],"attributes":{}},{"id":"product-buy-today-will-ship-tomorrow","value":"Kup dzisiaj, a wyślemy jutro.","attributes":{}},{"id":"product-discontinued","value":"Produkt wycofany ze sprzedaży","attributes":{}},{"id":"product-power-plug-info","value":"W przypadku urządzeń elektrycznych, urządzenia zaopatrzone są we wtyczkę europejską typu C, E lub F.","attributes":{}},{"id":"product-delivery-btn-from","value":"Wysyłka od","attributes":{}},{"id":"product-delivery-btn-free","value":"Darmowa dostawa","attributes":{}},{"id":"product-delivery-h","value":"Wysyłka","attributes":{}},{"id":"product-shipping-in-24h","value":"Produkty wysyłamy w ciągu 24 godzin.","attributes":{}},{"id":"product-free-delivery-from","value":"Darmowa dostawa przy zakupach od","attributes":{}},{"id":"product-delivery-methods-h","value":"Sposoby wysyłki","attributes":{}},{"id":"product-shipping-to-other-countries-h","value":"Wysyłka za granicę","attributes":{}},{"id":"product-delivery-cost-h","value":"Koszt wysyłki","attributes":{}},{"id":"product-estimated-shipping-date","value":"Przewidywana wysyłka","attributes":{}},{"id":"product-estimated-delivery-date","value":"Przewidywana dostawa","attributes":{}},{"id":"product-delivery-country-l","value":"Kraj dostawy","attributes":{}},{"id":"product-delivery-cost-from","value":"od","attributes":{}},{"id":"product-payment-h","value":"Sposoby płatności","attributes":{}},{"id":"product-shipping-to-poland-h","value":"Wysyłka do Polski","attributes":{}},{"id":"product-products-in-bundle","value":"Produkty w zestawie","attributes":{}},{"id":"product-description","value":"Opis","attributes":{}},{"id":"product-specs","value":"Specyfikacja","attributes":{}},{"id":"product-downloads","value":"Do pobrania","attributes":{}},{"id":"product-reviews","value":"Opinie klientów","attributes":{}},{"id":"product-related-products","value":"Produkty powiązane","attributes":{}},{"id":"product-producer","value":"Producent","attributes":{}},{"id":"product-quantity-in-bundle","value":"Ilość w zestawie","attributes":{}},{"id":"product-cheaper-in-bundle","value":"Taniej w zestawie!","attributes":{}},{"id":"product-filename","value":"Nazwa pliku","attributes":{}},{"id":"product-file-size","value":"Rozmiar pliku","attributes":{}},{"id":"product-download","value":"Pobierz","attributes":{}},{"id":"product-write-product-review","value":"Dodaj opinię","attributes":{}},{"id":"product-related-products-h","value":"Sprawdź również","attributes":{}},{"id":"product-thanks-for-review","value":"Dziękujemy za podzielenie się opinią o produkcie","attributes":{}},{"id":"product-availability-l","value":"Dostępność:","attributes":{}},{"id":"product-shipping-time-l","value":"Czas wysyłki:","attributes":{}},{"id":"product-rating-l","value":"Ocena:","attributes":{}},{"id":"product-review-count-l","value":["(na podstawie ",{"type":"var","name":"count"}," recenzji)"],"attributes":{}},{"id":"product-ean-l","value":"Kod produktu:","attributes":{}},{"id":"product-producer-l","value":"Producent:","attributes":{}},{"id":"product-share-product-h","value":"Udostępnij produkt:","attributes":{}},{"id":"product-variants","value":"Warianty","attributes":{}},{"id":"product-no-description","value":"Pracujemy nad opisem.","attributes":{}},{"id":"product-description-disclaimer","value":["Mimo dołożenia wszelkich starań nie gwarantujemy,","\n","że publikowane dane techniczne i zdjęcia nie zawierają uchybień lub błędów,","\n","które nie mogą jednak być podstawą do roszczeń."],"attributes":{}},{"id":"common-cannot-verify-user","value":"Obecnie nie możemy zweryfikować Twojego konta. Spróbuj ponownie później.","attributes":{}},{"id":"common-recover-account","value":"Odzyskaj swoje konto","attributes":{}},{"id":"common-send-authentication-code","value":"Wyślij kod uwierzytelniający","attributes":{}},{"id":"common-recover-instructions","value":"Wprowadź adres e-mail powiązany z Twoim kontem. Jeśli jesteś w naszym systemie, wyślemy Ci wiadomość z kodem uwierzytelniającym.","attributes":{}},{"id":"common-enter-authentication-code","value":"Właśnie wysłaliśmy do Ciebie wiadomość e-mail z Twoim kodem uwierzytelniającym. Wprowadź kod w powyższym formularzu, aby zweryfikować swoją tożsamość.","attributes":{}},{"id":"common-authentication-code","value":"Kod uwierzytelniający","attributes":{}},{"id":"common-verify","value":"Zweryfikuj","attributes":{}},{"id":"common-re-send-authentication-code","value":"Wyślij kod ponownie","attributes":{}},{"id":"common-authentication-code-needed","value":"Musimy potwierdzić Twoją tożsamość","attributes":{}},{"id":"common-invalid-authentication-code","value":"Nieprawidłowy kod uwierzytelniający","attributes":{}},{"id":"erotic-consent-h","value":"Chcesz odkryć więcej?","attributes":{}},{"id":"erotic-consent-p","value":"Kategoria Erotyka jest tylko dla dorosłych. Idziesz dalej?","attributes":{}},{"id":"erotic-consent-accept","value":"Mam ukończone 18 lat","attributes":{}},{"id":"erotic-consent-decline","value":"Nie mam ukończonych 18 lat","attributes":{}}]

Złącze Jack - Jack optyczne

Specyfikacja

Opinie klientów