Bosch Wireless Radion Breakglass, RFGB

Battery Life: Up to 5 years using one user-replaceable CR123A Lithium battery.

Coverage Range: Maximum radius of 6 m (20 ft) from the glass being protected.

Glass Types: Detects breaking of plate, tempered, laminated, and wired glass up to 6.4 mm (1/4 in) thick.

False Alarm Immunity: It uses "Dual-frequency" technology—it must hear the low-frequency "thud" (flex wave) of an impact followed immediately by the high-frequency "shatter" to trigger an alarm.

Mounting: Features an integrated bubble level in the base to ensure it is installed straight on the wall or ceiling.