1. Automatically turn on the running water when the pet approaches, leave the sensing range 2-3 , filter for , and then automatically stand by; 2. Advantages: silent, energy saving, prolong the service life of the filter and the water pump, and can better attract pets to drink 3. Induction range: about 0.2-3 . Use range: any water dispenser with USB interface can be used. 4.USB socket: USB wiring for easy connection. The cable length is 1.6m. Instructions: 1. Insert the USB plug of the pump into the USB input port of the sensor. Then insert the USB plug of the sensor into the adapter. 2. Suck the sensor in one place.(shiny or glossy surface) If there are no pets nearby, it will remain stationary, it will automatically and filter four a day, saix hours, to clean water Colour:White Material:plastic Package Contents: 1 x Smart Motion Sensor Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.