Check the listing for details. TekPower TP30SWV 30A 13.8V Switching Type Power Supply with Noise Offset. Condition: New. Listed at 139.95 USD. TekPower TP30SWV 30 Amp DC 13.8V Switching Power Supply with Noise Offset The TekPower TP30SWV is a professional Digital DC power supply for powering many devices such as Ham/CB radio and amplifiers. It is a highly stable, fused, high quality switching power supply with 13.8V fixed, 9-15V adjustable DC power output, and 30A max current. It has a main DC output on the back of the unit, a cigar socket, and a snap in output on the front. It has excellent line and load regulation, low ripple and noise. It is designed to minimize switching noise specifically for communication uses. When there is noise, you can use the noise offset knob to eliminate it. It has many safety protection such as overheat and short circuit protection. It comes with basic 1 Year USA warranty.Specification:Input Power: 110V AC 60HzOutput: DC 13.8V, 9-15V adjustable, 30A(Max)Cigarette Plug: 10A maxSnap in output: 3A maxRipple voltage: less than 80mVp-p at rated loadFuse: 110V, 8ADimensions: 7.5 X 2.8 X 7.5 inchesWeight: 6 lbPackage:TP30SWV Power Supply unitPower CordUser manual.