Wireless Door Bell Welcome Alarm Chime Motion Sensor Detector Suitable For Home, Office, Unit, Shed, Conservatory, Garage, Sectional Building etc. Mounting height is adjust to 2M or so, mounted on the corner of the room is preferable. Survey horizontal angle 84. Advanced microcomputer technology and automatic human sensitivity are applied to the quest saluting and alarm door bell. Strong sensitivity, non-mislead and anti-interference technology make it effectively detect the movement of the human in the detecting area of all environments. Net Weight : 103g Detection Range : 6-10metres/ Detection Angle : 84 Degrees/ Alarming Sound Depth : 75-95DB/ Operating Temperature : -10 Ro +45 Degrees/