The 2GIG-GB1-345 is a wireless glass break detector that uses audio sensors that detect the sound of glass breaking. The GB1-345 is fully supervised,tamper-protected, and easy to mount on either a ceiling or wall. With a 360° maximum horizontal sensing angle, the GB1-345 provides a wider coverage area than any normal door and window sensor. The GB1-345 can detect the sound frequency of glass breaking up to 15 feet (4.6m) maximum distance range using a dual-stage technology. This glassbreak detector communicates with the control panel using the 345 MHz frequency. The 2GIG-GB1-345 glass break sensor is disguised as a smoke detector to ensure that it will stay hidden from any potential intruders. The GB1 is a great option for covering multiple windows in an area, with only one device.