Customize Button Actions Create a smart scene and set single/double/long press as you like in the APP eWeLink to turn on/off WiFi devices in the selected group. Camera Functionality Add a camera and enable the camera functionality on the sensor to know what's happening in your home. Low Battery Notification This is a battery-operated ZigBee wireless button switch. You will receive a low battery notification when the battery life is 10%. Easy Installation Place on the desk to use or Tear off the protective film of the adhesives and stick it on the desired place. Control one fire in two places Supporting two-way control. Connect the button with SONOFF smart wall switches and you can turn off the light downstairs after mounting. Low Battery Notification You will receive a notification on your phone when the battery life is 10%. Easy to Pair 1. Go to eWeLink APP, select the gateway you want to connect and tap Add to add a sub-device. 2. Then, long press the reset button RST on the device for 5s until the LED indicator flashes three times, which means the device has entered pairing mode, and please be patient until the pairing is completed.