Technologically advanced with a voice warning system that announces “Fire, Carbon Monoxide, Low Battery, or Smart Hush™ activation.”\\nFeatures\\n - 2 AA batteries (included)\\n - Fuel cell sensor\\n - 85 dB at 10'\\n - 5 3/4" x 1 11/16" \\n - 13 oz \\n - 10-year warranty\\n - UL listed\\n - 1/Each Model Number: KN-COSM-B|UOM: EA