Dual USB car inverter 4000W for auto power conversion1、4000W inverter, car inverter with 2 USB ports and AC outlet, comes with free cigarette lighter and 2 battery clips, providing 300Watt continuous power, 4000watt peak power (Please make sure that the total rated power of the connected devices is ≤ 300W). 2、LED Battery diaplsy, battery level bar for LED Display shows the battery capacity, which can remind you that when your battery no power. When connect the battery with inverter, this LED Screen work and show the real‑time capacity of battery. It have five level (lattice) of the battery level bar, and each lattice represents 20% of the battery power. When your battery is no power, the display will to remind you that you need to charge your battery. 3、Fast charging dual USB ports, one AC outlets and two usb ports can offer 100% fast charging for Mobile phones, computers, laptop, breast pump, , Razors, emergency equipment etc, can be as a emergency power supply. 4、Multi protection, built‑in fuses, safe charging design and cooling fan prevents the car power converter from over‑heat,saving power and energy. Over voltage, overload, over‑current, short circuiting, under‑voltage, overheating, short circuit protection. 5、Lightweight design and top quality, ideal for vacations, camping and work trips. It can be plugged into almost any 12V power output vehicle, providing charging opportunities anywhere.