Features: 1.With external fuse, has reverse prompt, battery level display function. 2.With 1 Type C port and 3 USB port, conv enient to use. 3.Built in microcomputer processor and complete protection circuit, provide installation protection functions, such as undervoltage protection, overvoltage protection, overload protection, over maintenance protection, short circuit protection, over temperature protection, surge protection, etc. 4.Intelligent automatic protection function, advanced anti-interference technology, soft start circuit, convenient operation mode. Specifications: Material: metal Color: As picture shown Circuit Topology: Full Bridge Inverter efficiency: 85 (%) Load adjustment rate: 5 (%) Output frequency: 50 (HZ) Maximum output power: 4000 (W) Rated power: 700 (W) Packing List: 1 x Car inverter 1 x Black and red power cord 1 x Car charger cable 1 x Instruction. Note: Please note that air conditioners, induction cookers, microwave ovens, coffee machines, water pumps, oxygen generators, and large refrigerators cannot be used.