Designed to be discreet until there’s an emergency. One-Heat® from Lumi-Plugin is the world’s smallest mains heat alarm without our Downlight, it connects wirelessly to Lumi-Smoke®, Lumi-Heat® and One-Smoke® to provide optimum coverage and keep your ceilings clear. Mains powered with 10year lithium battery back up. Rf interlinked with all the Lumi-Plugin devices. BS 5446-2:2003 A1 3201-001 Voltage 110V AC / 230V DC Battery type Non-replaceable CR2 10-year battery Interlink frequency 868MHz Operating humidity Up to 95% RH non-condensing Operating temperature +4ºC to +38ºC (tested 0ºC to 55ºC) Power consumption 145mAh in non-alarm condition Sound Audible indicator minimum 85dB @ 3 metres in anechoic successive tones Fire-rated 30/60/90 – Solid Joist 30 – Metal Webbed Joist & I-Joist Complies to BS 5839: Part 6 Grade D1 Product colour White Dimensions Cut-out size 92mm Diameter 110mm Height 116mm Depth 92mm