For more information, open this specification:PDF FILE

Input Voltage........................................................ (Dual) 120/277 VAC, 60Hz Input Rating.................................................................................... 2.0 Watts Output Voltage.....................................................................24 VDC Nominal Output Current..................................................................290 mA (constant) Output Power.................................................................................7 W (Max) Emergency Operation...................................................................90 minutes Operating Temp............................................................................0° to 55° C Battery................................................................................. Nickel-Cadmium 24 Hour Recharge 7-10 Year Life Expectancy Weight............................................................................................... 4.0 lbs. UL Conditions of Acceptability..................................... Must be factory wired Battery temperature must not exceed 55° C