First Alert HD6135FB Hardwire Heat Alarm With Battery Backup Summer10 Works with most 3

Works with most 3

Low Carbon wire can be easy to work with but it is prone to elongation

Valve adapter easily converts manual plastic valves to automatic operation

keeps hot for 7 hours

First Alert HD6135FB Hardwire Heat Alarm With Battery Backup Summer10 Works with most 3Highlights: 120 volt AC DC with 9 volt battery backup 135 degrees Fahrenheit fixed rate and rate of rise temperature sensing Microprocessor controlled for fewer nuisance alarms The test silence button both silences a non threatening alarm or low battery warning and allows you to test the unit's functionality Latching alarm indicator which automatically identifies which unit initiated the alarm 120 volt AC inter connectable (with maximum 18 compatible