The Smartvest wireless siren is equipped with a loud siren (up to 100 dB) and a red LED flash for alerting indoors and outdoors. Thanks to battery operation (battery life up to 2 years), it can be installed without wiring and a low battery level is immediately reported to the control panel. In order to guarantee real safety, the Smartvest wireless siren has sabotage protection by means of a wall demolition contact. Also compatible with Smart Friends Alexa.