Don't let the silent killer known as carbon monoxide (CO) harm yourself or your family. Protect yourselves from this odorless, colorless and potentially deadly gas with a carbon monoxide detector / alarm built to the same high standards of those that protect industrial plants and hospitals! A built-in electrochemical sensor continuously monitors for CO and is unaffected by other airborne substances or temperature variations. Additionally, this carbon monoxide detector's quick response time, fastclearing time and superior false alarm immunity tower above the reliability levels of other CO alarms! This life-safety carbon monoxide detector device is designed specifically for use with monitored security systems. When it detects potentially harmful levels of CO, it emits a loud 85dB audible alarm AND alerts security monitoring personnel who can summon help from local paramedics and fire departments. The carbon monoxide alarm unit's contoured design and small size make it perfect for residential applications. A low 8mA current draw eliminates the need for an additional power supply. The carbon monoxide detector sensor connects to any zone of a hardwired security system via four-conductor cable. Note: Summoning of fire personnel or medical help requires optional service from a commercial third-party monitoring company, which typically charges a nominal monthly fee.