Wireless interlinked CO alarm rapidly detects carbon monoxide, which is odourless, colourless and cannot be detected by human senses. Can be used independently as a single unit or linked with up to 50 FireAngel Pro Connected products and the FireAngel Gateway to allow for remote notifications to the app. Powered by a 10-year sealed for life Panasonic battery. Ideal for any room that contains fuel-burning appliances. Interlinked via Wireless 10-Year Sealed Tamperproof Lithium Integrated Battery 85dBA Alarm at 3m Test/Hush Button Advanced Electrochemical Sensor Backwards Compatible with Wi-Safe2 Devices Sleek & Polished Design Interlinked via Wireless 10-Year Sealed Tamperproof Lithium Integrated Battery 85dBA Alarm at 3m Test/Hush Button Advanced Electrochemical Sensor Backwards Compatible with Wi-Safe2 Devices Sleek & Polished Design