Desktop Bench Power Supply: 13.8v 30a power supply AC-to-DC Power Converter, DC 13.8Volts fixed ouput, providing up to 30amp maximum current. Cigarette Lighter Socket: 13.8v 30a dc power supply for ham radio designed with 12V cigarette lighter socket adapter to supply power to portable device. Safety Protection: SKY TOPPOWER power supply 30 amp has short-circuit protection, over-current protection to ensure the safety of the operator and any connected electrical devices, plus a user replaceable fuse (8A),built-in cooling fan to prevent the device from overheating. Accurate,Compact & Lightweigh Design: Solid and well built, weight about 1.5kgs, with robust metal casing , rubber feet stand. Accurate Readoutand quick response,one-key switching of voltage and current display. Manufacture's Warranty: 30 days money back with 12 months product guarantee, 7/24 customer service provided. Please contact SKY TOPPOWER Team for any other questions.