This slim wireless door & window sensor is ideal for door and window applications and features Ness's industry-leading two-way technology.
One built-in reed switch,
Front and back tamper option
The low profile body of the reed switch and supplied magnet allows for unobtrusive installation on door and window frames in cases where wired reed switches cannot be used.
142-041 (ER14250) battery included
Specifications
902 Mhz - 928 Mhz frequency hopping
Maximum operating gap of reed: 13mm (1/2�)
3.6V ER14250 lithium battery
Battery Life: 7 years typical
Size: 18mm(W) x 86mm(L) x 20MM(D) , Magnet: 14.5mm(W) x 38mm(L) x 15mm(D)