Very Low Stock Watchguard Alarm Systems Watchguard ALC-GB1 2020 Wireless Glass Break Detector 2020 Wireless Alarm System ALC-GB1 $ 61.10 Glass break detector can detect breaking glass up to 7m Pinpoints glass-breaking incidents with a high-precision microphone Minimizes false alarms with sophisticated signal processing Transmitting distance up to 100m DC12V power supply Add to cart