The LUPUSEC-XT Panic-Button is a safety tool, which triggers an immediate alarm notification in case of a robbery, regardless of system arming status . The dimensions are handy, so it's easy to wear during control walks. For home use the Panic-Button is easy to install close to your sleeping place. The XT-1 is capable to work with up to 20 sensors and the XT-2 with up to 160. All sensors are long life battery powered and wireless connected to the main unit. So there is absolutely NO need for any wiring!