Feature: 1.Easy to connect to your vehicle battery(through cigar cable or alligator clip cable). 2.With AC 220V outlet and USB port,apply in household applicance and many other electronics,like laptops,cell phones,amplifier,freezer,etc. 3.Efficiency up to 90.5%,super surge capacity to start difficult load. 4.Built-in protections from short circuit,overload,overheat,low voltage and over voltage.Keep your device and car safe. 5.Built-in cooling fan for span life and safety use. 6.Smart size,light and compatible,lower noise and no pollution.