Starrybay&reg; 500w Reliable Portable Big Capacity Dc 12v to Ac 110v Power Car Inverter with Dual USB Charging Ports and Cigarette Lighter (Hot-a1-00121) Adopting all-mental aluminum shell,making the inverters safer,with over 90% of conversion efficiency. Suitable for nominal power home appliances and equipments,such as TV,induction cooker,computer,lamp,refrigerator,air conditioner and so on. Professional design and many protection functions(overheat,overvoltage,under voltage,overload,over current etc) Transformers using special technology, with the capacity to make a stronger, more reliable, more stable. It will automatically shut down in the event of short-circuits, low battery power, DC input voltage overload, output overload, or excessive temperature. It can resume working automatically after these exceptions eliminated. Comes with battery clamps and car cigarette adapter. Please tighten the Positive (+) and Negative (-) terminals nuts when connecting to car batteries. This inverter is only for DC 12V car use, can NOT be applied to DC 24V.