... for home, office, shop, warehouse, shed etc.Features:Wireless, infrared detector, motion-activated Detection area: 10m/ 30 ... use it directly facing to the sensor Support 220V Charger(not included) Do not fix this senor near ... 3 month if you do not use 220V charger. Alarm Power Supply: 4 x 1.5v ... button, it will recover the initial state. wireless infrared inductive alarm with 2 remote control for home ...