Mini wireless glass break detector, electro-acoustic. Ideal for securing rooms with multiple windows. High detection reliability through simultaneous evaluation of air pressure and noise. Max. range 9m, min. glass area 0.6 x 0.6m. Can also be used in vehicles. Incl. tamper switch. Frequency: 868 MHz. Power supply: 1x 3.6V AA lithium battery (LST14500, included). Dimensions: 46 x 88 x 27mm.