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Specifications Color: White Shape: Rectangular Material: Iron, Plastic Process: Baking Paint Assembly Required: No Power Source: Corded Electric Plug Type: Us Standard Screen Type: Led Input Voltage: Ac 110v, 60hz Output Voltage Range: 0–30v(Continuously Adjustable) Output Current Range: 0–20a(Continuously Adjustable) Display Resolution: 0.01v, 0.01a Working Environment: -10 ℃~40 ℃/14~104℉(Relative Humidity: <80%) Storage Environment: -20 ℃~80 ℃/-4~176℉(Relative Humidity:<80%) Package Included 1*Dc Power Supply 1*Power Cord 1*English Manual.