Be alerted to dangerous carbon monoxide leaks with the First Alert CO410 Battery-Operated Carbon Monoxide Alarm with Backlit Digital Display. This carbon monoxide detector uses an electrochemical carbon monoxide sensor. An easy-to-read digital display allows for a quick view of current and peak carbon monoxide levels. This unit is powered by 2 AA batteries. It offers peace of mind even during power outages. . Highlights: Model number CO410 Detector alerts if elevated carbon monoxide levels are present Easy-to-read backlit digital LED display Advanced electrochemical carbon monoxide sensor Loud 85dB alarm Requires 2 AA batteries Specifications: Dimensions (Overall): 8.5 inches (H) x 6.75 inches (W) x 2.62 inches (D) Weight: .45 pounds Requires Hardwired Installation: Yes Package Quantity: 1 Product Name: First Alert® Battery-Powered Carbon Monoxide Alarm with Backlit Digital Display Battery: 2 AA Alkaline, Required, Installed Warranty: 7 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869