DC Power Supply Variable, 30V 6A 10A Adjustable Switching Regulated DC Bench Linear Power Supply with 4-Digits LED Power Display , Coarse and Fine Adjustments with Alligator Leads Features: 1, With more extensive range of input voltage at 230V±10% 50Hz （Can be customized to 115V±10 60Hz） 2, With high frequency operation can reduce the size of power transformer. 3, With small size, light weight and high density power. 4, Entire efficiency rate higher up to 70%. 5, Zero adjustment for the output of voltage and current. Parameter Specification Operation Environment : Indoor use,Altitude up to 2000m, Installation Category II, Pollution degree 2. Operation Temperature &Humidity : 0℃to 40℃, <80%. Storage Temperature & Humidity : -10℃to 70℃, <70%.