Compact and easy to fit or use as a portable unit - Certified for use in houses and boats/caravans Powered for life, sealed lithium battery (7 years) included - Suitable for landlords Comprehensive indicator lights (Green - power, Red - CO detected, Amber - Fault) Memory feature - Indicates if CO has been detected & at what level Manufacturer's 5 year guarantee - Made in Ireland, Weight: 0.39242282636 Pounds, Manufacturer: Ei Electronics