Dimensions (Overall): 3.38 Inches (H) x 4.87 Inches (W) x 1.56 Inches (D) Weight: .45 Pounds Includes: Battery Features: Silences Unwanted Alarms Package Quantity: 1 Requires Hardwired Installation: No Battery: 1 9-Volt Alkaline, Required, Included 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, •Keep your family safe with this easy to use, battery operated carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure •Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room •A loud 85-decibel alarm sounds when CO levels reach dangerous levels •To ensure complete protection make sure to place one on each level of your home and in each bedroom •5-7 year limited warranty; equipped with end-of-life signal chirp, so you know when it's time to replace the unit for safety •All First Alert CO alarms are rigorously tested to meet UL standards The First Alert CO400 Carbon Monoxide Alarm utilizes an electrochemical carbon monoxide sensor to monitor your space for a carbon monoxide threat. The battery-powered design doesn't require an electrician; simply insert the included 9-volt battery, and the carbon monoxide detector is ready to go.
The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel-burning appliances, blocked chimneys, and generators running inside or too close to homes. When CO levels become elevated, a loud 85-decibel alarm alerts you to the threat.
Because CO evenly distributes itself, it's important to have a CO detector on every level and in every bedroom of your home. Designed to be simple to use, the CO detector has just one button that silences or tests the unit, as well as an end-of-life timer that lets you know when it's time to replace the device.