Carbon monoxide (CO) detector powered by a long-life sealed battery. Designed to accurately measure low levels of CO. Featuring an advanced electrochemical sensor calibrated and tested in CO gas. Memory function indicates previous alarm activation. Features prominent visual alarm notification and advanced diagnostics support via cable. Ideal in any room that contains a fuel burning burning appliance e.g gas hob, open fire, boiler. Suitable for home and / or travel use. Standalone 10-Year Sealed Tamperproof Lithium Integrated Battery 85dBA Alarm at 3m Test/Hush Button Advanced Electrochemical Sensor Memory Function Prominent Visual Alarm Notification Portable Standalone 10-Year Sealed Tamperproof Lithium Integrated Battery 85dBA Alarm at 3m Test/Hush Button Advanced Electrochemical Sensor Memory Function Prominent Visual Alarm Notification Portable