Product Overview Powered by a single 9V PP3 alkaline battery, these alarms, with integral radio transmitters are suitable for all situations where Deaf and Hard of Hearing people require early warning of an outbreak of fire, whilst providing a powerful audible alarm for those with good hearing. A choice of Ionisation, Optical or Heat alarms with audible sounder are ideal for all domestic environments.If you need smoke detection in a kitchen or laundry environment we recommend the Silent Alert Heat Detector available hereIonisation alarms respond quickly to fire and should be used upstairs. Optical alarms detect larger smoke particles and can be used downstairs or near to a kitchen and are less susceptible to false alarms. Item dimensions 13.9 x 6.6 x 12.3 (cm)Item weight 199(g) Features Simple to use Wireless Range up to 1000m in open air Low battery monitoring Discreet design
