Self-powered for minimum 30 minutes - 6 VDC 36 W. Solid state transfer charger. Dual diagnostic LEDs indicate AC-ON and CHARGE. C860 approved LED EXIT and SORTIE models 120 /347 VAC dual input (hard wire). Push button test switch. Brownout and low voltage protection. Two top mounted high impact thermoplastic PAR18 9 W tungsten heads. Knockout chevrons 20-gauge steel construction with baked powder coat white paint finish.