Smoke detector and temperature sensor. Bidirectional. Wireless 868 MHz Jeweler. Internal antenna reach free space 1300 m. Built-in siren 85 dB. Smoke and excess temperature detection indicator. Anti-opening tamper. Supports autonomous operation. Power supply 2 CR2 3.0 V batteries / 1 CR2032 battery (estimated duration 4 years). EN 14604: 2005 certified. Indoor use. Includes support. Black color