This Fireangel combo alarm effectively protects from two unique threats at once, smoke and carbon monoxide. Featuring advanced optical sensing technology, this device will reduce nuisance alarms whilst still providing a quick reaction to high levels of smoke and temperature. Furthermore, advanced electrochemical technology allows for better CO detection. This combo alarm has two different alarms and indicator lights which indicate the threat it has detected, whether it be dangerous levels of smoke or carbon monoxide. It features a sealed for life 10-year battery, and a 30-day low battery warning alerts the owner of when the device needs replacing. Specifications: 3 year warranty, Colour: White, Product dimensions: H16.6 x W13.3 x D0.3cm, Material: Plastic, LED visuals for power and alarm, 85db alarm. These products fully comply with UK (UKCA) and EU (CE) regulations.