Mentrex Flamestop Stand Alone GS522

The GS522 responds sensitively and reliably to slow smoldering fires that produce thick, black smoke at low heat before open flames develop. The red LED blinks once every 40 seconds to indicate operational readiness. After 10 years, when the battery is low, a periodic beep will sound, which can be silenced for 10 hours using the mute button. At least one smoke detector should be installed in every room of the house, except for the kitchen and bathroom.