Main Feature: This sensor alarm can keep you aware of intruders or visitors in your home. It extends your security system. It's suitable for home, office, shop, warehouse, shed etc. Wireless, infrared detector, motion-activated; Detect angle: 110 degree; Detection area: 10m/ 30 feet long and 110 degrees wide; Include 2 direct infrared remote control (Up to 30m/ 100 feet), please use it directly facing to the sensor; Support 220V charger(not included); Do not fix this senor near; Heating materials Please check its sensitivity monthly, to make sure it is in good condition. Change batteries every 3 month if you do not use 220V charger; Alarm power supply: 4 * 1.5v AA batteries or 6v DC power(not included); Remote control power supply: 3 * AG13 batteries(included); Use for: Warehouse roll up doors, inside display cabinets, restricted area protection, (patio, bedroom, bathroom) window alert, home security