The Ajax GlassProtect is a wireless acoustic glass break detector. This sensor detects glass breakage up to a distance of 9 meters.
 
Detects glass breakage up to 9 meters
Operates at a distance of up to 2000 meters (open field)
Sensitivity level is adjustable in 3 different positions.
Power supply: 1* CR123A battery
Detection range 180°
Dimensions:20x90mm
Battery life up to 7 years