This is a car inverter. I bought it on Amazon, but I haven't had much use for it, so I'm offering it to someone who needs it. Below is the product description from Amazon: • Converts DC 12V power to more stable AC 100V power, allowing you to power electronic devices. Rated output: 200W (AC + USB) Input voltage: DC12V Output voltage: AC100V • After power is on, the LED light indicates whether the device is operating normally or abnormally with green and red colors, respectively. • Features overload protection, short circuit protection, overvoltage protection, undervoltage protection, and abnormal temperature detection protection, automatically shutting off in case of an issue. Equipped with a temperature control fan that increases exhaust heat depending on the temperature. Designed to be compact and lightweight. • With 4 USB ports and 2 AC 100V outlets, you can use it to power smartphones, laptops (some types of laptops may not be compatible; for example, if an older laptop has a high instantaneous power draw, the protection function may prevent it from working), video cameras, digital cameras, CD/DVD players, radios, TV games, iPads, electric shavers, electric razors, and other electrical appliances. • Common reasons for non-use include: The side key switch not turning on. The red light illuminates in case of overvoltage or undervoltage, indicating it is unusable. • This product is for DC12V negative ground vehicles only. It is not applicable to 24V vehicles. If using devices that exceed 200W, do not plug them directly into the car's cigarette lighter socket. Use the connection clips for the car battery. The cooling fan is installed, so there will be a small amount of noise during use. There is no problem with use, so please use it with confidence. For safe use, when using it in a car, please be careful not to exceed a total power consumption of 200W for the electrical appliances you are powering.