The Replacement Catit Drinking Fountain USB Pump with electrical cord does not included an USB adapter and is to be used ONLY WITH #50043 USB ADAPTER (available separately). Suitable for : •Catit Fresh & Clear Cat Drinking Fountain (3 L - green) (55600) ** •Catit Senses Cat Drinking Fountain (3 L - blue) (50761) ** •Catit 2.0 Flower Drinking Fountain (43742/43742W) ** • Catit 2.0 Mini Flower Drinking Fountain (43735/43735W) NOTE : ** For 55600/ 50761/ 43742/ 43742W it's important to verify USB pump/adapter replacement part(s) image against the fountain's existing part(s) - as some models use 1 part instead (#50068 replacement USB pump with USB adapter).