Waterproof Induction Trash Can DZT-7-2SAdjustable sensing distance 6 30cm 1. Before installing the battery (if the battery needs to be taken out of the battery), first press and hold the button switch 2. The other hand installs the battery into the battery compartment (the indicator light is green) 3. Place the hand with the battery on the height above the sensor window (the adjustment range is only between 6cm 30cm) and keep the height of the hand unchanged. 4. After the release button