The 5800CO is a 3V battery powered wireless carbon monoxide (CO) detector intended for use with Honeywell alarm systems that support 5800 Series wireless devices. It provides early warning when its electrochemical sensing technology measures carbon monoxide levels in the air. The 5800CO is specifically designed for system operation and is fully listed to UL 2075 as a system supervised detector.* It contains a piezoelectric horn which generates the ANSI S3.41 temporal 4 pattern in an alarm condition. The detector consists of an electrochemical carbon monoxide sensor assembly coupled with a wireless transmitter. The transmitter can send alarm, trouble, end-of-life, tamper and low battery condition messages to the alarm panel. Since there are no holes to drill or wires to run, you can preserve the beauty of the home or building while protecting its occupants from harmful carbon monoxide gas. The 5800CO is an ideal carbon monoxide detector for difficult to wire locations, applications where room aesthetics are critical or where hazardous materials exist.