Aico Ei603 Heat Detector Alarm 10Yr Lithium Battery. With More Mains Powered Domestic Smoke Alarms Installed In The Uk’S Social Housing Than Any Other Manufacturer, They Are Tried, Tested And Trusted. Aico Are Innovators, Regularly Bringing New Technology To The Market Place, Such As Radio Link. Their Award Winning Radiolink Was The Very First Domestic Fire Alarm System To Feature Wireless Alarm Interconnection. Aico Has Continued To Develop Radiolink To Allow For Integration With Third Party Systems Such As Sprinkler And, Most Recently, Warden Call Systems. These Flexible Solutions Provide Comprehensive Fire And Co Protection In Any Domestic Dwelling, Using Quality And Reliable Alarms. The Aico Ei603 Is A Battery Heat Alarm Is Activated By Heat From A Fire, Not Smoke, Which Makes It Ideal For Kitchen Installations Where Smoke Detectors Are Prone To Nuisance Alarms. The Alarm Sounds When Temperatures 58° Or Over Thanks To Its New Thermistor Which Has A Lower Thermal Mass Enabling It To Give Faster Alarm Responses. The Ei603 Has A 10-Year Lithium Battery That Is Non Replaceable. The Battery Is Designed To Be Tamper Proof And Maintenance Free And Will Last For The Working Life Of The Alarm. Dimensions: 115 X 55mm