Filter Replacement Time:1.The Charcoal Filter it is better to be exchanged every month to achieve good filtering effect.2.In intelligent sensor mode, Charcoal Filter better to be exchanged every 1-2 months.About Motion Sensor:1. Automatically turn on the running water when the pet approaches, leave the sensing range 2-3 meters away, filter for 60 seconds, and then automatically stand by.2. Advantages: silent, energy saving, prolong the service life of the filter element and the water pump, and can better attract pets to drink more water.3. Induction range: use range of about 0.2-3 meters.4.Install: suction cup or paste.Friendly Tips:Please clean the pump regularly to extend life. Operating sensor:Hold the round head of the sensor with the palm of your hand without light for 60 seconds, the water flow of the water dispenser will stop.