Carbon Monoxide Alarm | K5CO Continuous monitoring Multi-function LEDs End-of-life alert Test/Reset button 2 x AA alkaline batteries (Included) Kidde Carbon Monoxide Co2 Alarm Compact and lightweight battery-powered CO alarm provides essential protection against the dangers of deadly carbon monoxide and provides continuous monitoring of CO levels. This small, easy-to-use alarm is ideal for use in all living areas and can be installed on a wall or ceiling or used freestanding on a table or shelf. Certified to the latest EN50291-1:2018 Standards Features Continuous monitoring of carbon monoxide Multi-function green and red LEDs to indicate power and alarm status End-of-life alarm alerts user to replace alarm after a minimum of 10 years’ protection Test/Reset button to allow regular testing of alarm function Battery operation – 2 x AA alkaline batteries supplied as standard