Labor Saving Quick Connect Mounting Backplate and Ceiling Mount Safety Clips makes the EMS Series a very contractor friendly unit. Ships Standard with Two fully adjustable Chrome Plated Heads. Construction High Impact V5 Flame Retardant Thermoplastic. Finishes White and Black Housing with Clear Lenses. Illumination Provided by Two Fully Adjustable 6V 5.6 Watt Lamps. Installation Wall or Ceiling Mount, with easy backplate Knockouts for most standard junction boxes. Approved for Ceiling Mount with Safety Clips (Incuded). Electrical All units are standard with 120/277 input voltage transformer. When normal AC power fails, the on board transfer switch automatically connects to the battery for 90 minutes of power and is recharged in 24 hours. Features º 6 Volt 4.5Ah Lead-Calcium Battery º Universal 120/277 VAC Operation º Low Voltage Battery Disconnect º Damp Location Rated º ETL Listed Warranty Three Year Full Warranty Three Year Battery Warranty