Mengshen Infrared Motion Sensor Alarm - Burglar Alarm with 2 Remote Controls, Suitable for Home/Garages/Shops, H88 Super Loud: 105db. Wireless Alarm: Built in PIR motion sensor, 2 remote controls included. Adjustable: 110 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). Suitable For: doors, sheds, garages and more.