Infrared Motion sensor alarm

Infrared Motion sensor alarm
1, For home, office, store, warehouse and other situations.
2, Detection distance: up to 10 meters.
3, Send piercing sound automaticly when someone pass through or close to.
4, Sound is big enough to alert people even in noisy conditions.
5, Alarm will be turned off automaticly in 30 seconds; or can be stopped by remote.If signal detected again, alarm will repeat.
6, Power supply: AA*4PCS or DC adapter.