1.Fixed Output DC Power Supply: DC 13.8V (Fixed), Input voltage: 110V AC and suitable for alligator to banana test lead , hook to banana test cable, Anderson Power Pole connectors and It designed with 12V cigarette lighter socket adapter to portable device. 2.Desktop Bench Power Supply: Working with amateur radio, HAM radioHF, VHF and UHF ham radio, cellular phones, CB radio, scanner and so on. 3.High Efficiency, Compact Switching Power Supply: 5.9(W) x 8.6 (H) 2.7(D) inch. Weight: approx 3.3 lb. With a colorful shows the 3-digit HD readout, plus a user replaceable fuse (8A). Noise Off Set can be use to move or lessen the FR noise. 4.Safety Protection: Built-in cooling fan and Side vents for better fanning. Multiple Protections include grounding wire, boundary current protection, thermal protection, voltage overload protection, over-current protection, short circuit protection