Family Gard brand, dual ionization. Uses a 9V battery designed to last up to 1 year. Repeated beeping warns when battery needs replacing. Loud 85dB alarm horn and test button. Compact design measures 4-3/4 x 6. 3 year limited warranty. Boxed. UL listed. 9V battery included. Not for sale in Vermont or Oregon. Type: Fire Extinguishers