Note: This wired break detector needs to work with alarm system. Features: *812 bit microprocessor-controlled digital signal processing (8MHz). *Used to identify break or crash sound from other sounds by frequency. *It will not be fooled by the sound of pets, or any other sounds outside of its frequency . *It will send signal to the Alarm System Main Unit when detects break sound. *Adjustable sensitivity: covers up to 9m (30ft) when set to high place and up to 4.5m (15ft) when set to low place. *7 frequency digital filters, digital gain and frequency fluctuation assessment. *It covers a large area of windows. Install to ceiling or wall close to window. *High-immunity to RFI and EMI signals Specifications: Digital Processor: 812 bits 8MHz Power Supply: DC 9-16V, 17mA Alarm Output: DC28V 0.15A, Normally closed Tamper Switch: DC28V 0.15A, Normally closed, cover removed open circuit Protection : Maximum sensitivity: 9 meters distance Sensitivity: Continuously adjustable Window Size: of any size Detecting: Green on Alarming: Red on for 3s Material: ABS Operating : -20 ° C to 50 ° C Operating humidity: 95% Item Size: Approx. 9 * 6.8 * 2.5cm(L*W*H) Item Weight: Approx. 45g / 1.6oz Package Information: Package Size: Approach. 9.5 * 7 * 3.3cm / 3.7 * 2.8 * 1.3in Package Weight: Approach. 54g / 1.9oz Package List: 1 * Wired Sensor(no cable)