Power Supply 12/24Dc @ 4A, Type Power Supply/Charger Board, Material Phenolic or Fiberglass, Length 4.60 In, Width 7.50 In, Height 2.70 In, Input Voltage 28VAC, Voltage OUTPut 12VDC or 24VDC, OUTPut Current 12VDC @ 4A or 24VDC @ 3A Amps, Input Frequency 60 Hz, Standards UL RECOGNIZED, UL294, Includes Battery leads, Tape