Wireless motion sensors known as PIR’s are used to detect body movement in an open space. This is a curtain PIR sensor. It is idea for protecting areas where there is a lot of glass windows. It consists of digital dual-core fuzzy logic infrared control chip which means it effectively identifies human body movement.

Specifications:
Transmission range: 40 metres (open area)
Transmission range: 30 metres (through two walls)
Battery Type:  2 x AA Lithium
Battery life: 3 years
Battery Type:  2 x AA Alkaline
Battery life: 1 year