Specifications:Size (L x W x H) (inches): 9.7 x 5.0 x 2.5Ripple and Noise (mV p-p): 150Load Regulation: 0.5%Line Regulation: 0.5%Input: 85-264VAC @ 47-63HzSwitch-selectable AC inputAdjustable Voltage 21 - 25.8 VDC 24 volt DC - 25 Amp Regulated Switching Power Supply This unit will cold start and hold up to a 25 amp load.This is a high quality commercial / industrial grade voltage regulated unit. 25 Amp Peak, 22 Amp Continuous, Regulated Switching Power SupplyAwesome for powering your high-powered car stereo, CB or HAM radio equipment in the house or for any project needing 24 volts DC. This unit has a built in cooling fan on a thermostat to control fan speed at all temps. and over voltage/short circuit protection.It operates on 120 volts AC or 220 volts AC, 47Hz to 63Hz. It's fully shielded for use in a computer or radio environment.