FeaturesFederal signal power supplies provide nominal 12 VDC or 24 VDC power that is switch selectableThe steel enclosure is designed to mount on a wall or substantial vertical surface (indoor only), a key lock is provided to discourage unauthorized access simple lock installation is requiredThe power supply sub-assembly, which recharges the batteries, includes solid circuitry that provides DC operating voltage to units in a SelecTone® system, while maintaining a charge level on the batteriesAll of the units can also be used as a primary 12 to 24 VAC/VDC power source for other devices/systemsDesigned to use two 7 A hr, sealed lead-acid, gelled electrolyte batteries connected in series is rated for 2.5 A32 to 120 deg F operating temperatureIntegrated battery charger