Ideal for home and travel use, the Fire Angel CO-9B carbon monoxide detector is suitable for wall mounting or free standing. AA Batteries included. LED status indicators. CE and Kitemarked to BS EN 50291-1:2010 and A1:2012 (domestic use) & BS EN 50291-2:2010 (Camping/caravan/boats) 6.7x10.9x3.8cm - 7 year warranty. Sound output 85dB at 1m. Operatin temp -10 to +40 deg C.