Reliable Distance Range : Communication range up to 100m / 328ft (distance from the sensors to the receiver/alarm/chime) and detection range up to 8m / 26ft (distance from the sensors to the detected objects).
Adjustable Volume and Mode : The alarm in the receiver has a ring volume up to 100dB with 3 alert choices (High Volume Chime / Low Volume Chime / Alarm) and 3 mode choices (Sound / LED Flash / Sound and LED Flash).
Multiple Application : Perfect for keep you informed with a little warning before guests or intruders arrive. You can expand the alarm system for your home with up to 50 sensors or 50 receivers for your request.
Advice for Installation : Keep the PIR sensors in a clear path to the receiver and do not place the sensors where the wind will move them or change their detective angles, so that you can get optimal performance.
Power Source : You can either you 3 x 1.5V type C batteries (not included) or AC power adapter (not included) for the receiver, and 3 x AAA batteries (not included) for the sensors. Never use type C batteries and AC power adapter at the same time.