Mono-ammonium phosphate powder at 90% concentration, stored-pressure, with a squeeze-grip discharge and a pressure gauge you can read at a glance. Rated for ordinary combustibles, flammable liquids and gases, and tested safe on live electrical equipment up to 1000 volts. The powder melts and forms a crust over Class A material, which is what stops a smouldering fire from re-establishing itself after you walk away.
Mounted with the supplied wall bracket, discharged in a sweeping motion at the base of the fire. Requires pressure checking every six months and refilling every three years, or immediately after any discharge, however brief.
5 year manufacturer warranty against manufacturing defect. Warranty does not cover a discharged or overdue unit.