Bosch LV514188 Bosch Ledvance Home Smoke Alarm Starter Kit Features: Raises the alarm on site and remotely by app Detects and advises of fire hazard Audible alarm: The integrated Bosch Smart Home Smoke Alarm s siren sounds the alarm in case of danger. Visible alarm: The integrated LEDVANCE SMART+ Lamps light up yellow in case of danger. This also signals the alarm visually and can improve the illumination of escape routes Simple to use by smartphone Works with Zigbee products