How to use? 1. Turn on the power. 2. A green light will light up for about 20 seconds. During this period you may move around without triggering the siren. This gives you a chance to leave the room without triggering the alarm. 3. After 20 seconds, the green light will go out and the unit is in motion detect mode. At this point any motion within 5 m will trigger the siren. Once triggered, the 105db alarm will blare non-stop for 45-50 seconds and then re-sets itself to motion detect mode. 4. After the siren, you can turn off the power. Installation Method: 1. Fasten the socket on place 1.4-2 meters from the ground. 2. Open the battery cover, and install 4 AA batteries. 3. Fasten the motion detector on the socket, angle the motion detector's mounting bracket for a precise aim. the manufacturing model: -105 colour: white Material: ABS Package Contents: 4 * alarm 8 * remote control 4 * base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Suitable For: doors, sheds, garages and more. Specifications:Standby Current: 100uA;Alarm Current: 150mA;Volume of Siren: 105dB;Infrared Detection Distance: 5 m, 110 degrees wide Super Loud: 105db;Wireless Alarm: Built in PIR motion sensor, 2 remote controls included. Adjustable: 110 degree scanning area, adjustable wall mounting bracket. Power Supply: Alarm powered by 4 x AA batteries, remotes powered by 3 x AG13 button cell batteries (included).