[ Upgraded Cat Fountain ] Combined with Yilean infrared sensor module, it detects an object approaching or moving, and the water dispenser will work automatically. When there are no pets around, it remains stationary. The Yilean external sensor (without adapter and cat water dispenser) fits all cat, dog and pet drinking fountains with USB interface. For indoor use only. Don't touch the water. [ Energy Saving & Super Quiet ] Yilean Infrared Motion Sensor provides convenience, security, energy saving and practical functions. This device uses infrared radiation emitted by pet as a signal to work when pet is in the detection range. Reduce the noise of the cat and dog water dispenser, extend the life of the fountain pump, and stimulate pets' interest in drinking water. [ High Stability ] The Yilean cat water fountain sensor switch has a wide detection range, detection angle: 180, Detection distance: about 3M. High and stable sensitivity, effectively save power and improve efficiency. Extended time range: 30s(fixed stop time). The drinking fountain will stop working after the animal leaves the detection area for 30 seconds. It is a good helper to get the pet to drink. [ Practical and Convenient ] With the beautiful and simple flower appearance, the DC5V USB sensor switch for cat water fountain adopts durable and steady ABS material, is not only easy to hide but also convenient to use, size: 45mm*45mm*30mm, 1.8m USB input cable and 0.19m USB output cable. The accessories include screws and stickers, giving you more flexibility in usage. You can choose the suitable installation method according to your needs. [ Wide Application & Best Customer Service ] Package list: universal USB sensor (can suck and stick), scope of application: all cat water fountains with USB interface can be used. With the PIR motion sensor, it can detect human movement by detecting infrared rays emitted by the human body.