Mellif power inverter is designed to work with all Makita 18V max lithium batteries (NOT included), making it easy to turn your battery into a small generator for charging phones, tablets, laptops, and other small devices. With a DC to AC output voltage of 110v~120v and dual USB ports, it can deliver a maximum of 2.1A total output. The compact design includes a 450LM LED work light and weighs only 0.7LB, making it perfect for outdoor use and camping. Safety features include a small fan and ventilation holes for heat dissipation and protection against short-circuits, over-current, under-voltage, over-voltage, over-load, low-load, over-heat, and over-drain.