The sonoff sensor can help secure your door or window to let you know whether your home is safe wherever you are. The sensor can trigger an alarm to your smartphone to inform you of an intruder when the door or window is opened. Connect the SONOFF wireless IP camera and you can view who the intruder is on the sensor page of APP. Whenever your door or window is opened or closed, you can check the real-time alert eWeLink APP.

**NOTE: There is an issue with the clips that hold the batteries. The clips can cut into the battery’s protective layer and cause a short. Please do the following:

• Wrap a single layer of electrical tape around the battery to protect it before installing.
• As you install it, hold a piece of paper by the clip and push the battery in.