Ultra bright, energy efficient, long life Internal solid-state transfer switch automatically connects the internal battery to LED board for minimum 90-minute emergency illumination mounting hardware provided for back surface wall mount 5-year warranty on all electronics and housing. Battery pro rated for 5-years UL listed for wet locations illumination ultra bright, energy efficient, long life LED. Electrical dual 120/277 voltage. Charge rate/power on LED indicator light and push-to-test switch for mandated code compliance testing. 4.8V long life, maintenance-free, rechargeable Ni-Cd battery. Internal solid-state transfer switch automatically connects the internal battery to LED board for minimum 90-minute emergency illumination. Fully automatic solid-state, 2-rate charger initiates battery charging to recharge a discharged battery in 24-hours. Mounting hardware provided for back surface wall mount. Housing 5VA flame retardant, UV-stabilized polycarbonate gray finish. High-impact resistant, UV-stabilized polycarbonate clear lens. Corrosion-resistant enclosure with engineering grade silicone gasket. EZ snap-out chevron directional indicators. Optional internal heater for cold temperature applications. USA: substantial transformation assembly in the U.S. complies with assembled under the buy American act. SKU:20635 UPC:817354020635. Item weight: 3.88 lbs. package dimensions: 12.8 in. x 8.98 in. x 2.99 in. Color: Green.