SECOLARM GLASS BREAK DETECTOR SS-051 Specs: SS-051 -- On-board microphone, no remote microphone necessary. Dual-stage protection -- Chirps siren if window is lightly tapped, triggers alarm upon break-in or vandalism attempts. Protects against a would-be thief's forced entry into the car by breaking the window or punching a door lock. Attractively designed to match the interior of almost any car. Built-in audio discriminator enables the unit to filter out typical outdoor sounds to prevent false alarms. Patented yellow "Turbulence" LED allows accurate setting of sensitivity by warning if environmental noise is too high. Yellow LED indicates pre-intrusion alert. Red LED indicates intrusion. Microfine sensitivity adjustment controls for adjustment of interior zone. Modular plug for remote... Less