1. Automatically turn on the running water when the pet approaches, leave the sensing range 2-3 meters , filter for , and then automatically stand by; 2. Advantages: silent, energy saving, prolong the service life of the filter elements and the water pump, and can better attract pets to drink 3. Induction range: about 0.2-3 meters. 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 smooth surface) If there are no pets nearby, it will remain stationary, but it will automatically cycle 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 products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.