The Black + Decker 500 Watt Power Inverter with 3.1 amp USB port is a reliable and efficient device designed to convert DC power from your vehicle into AC power for your electronic devices. With a RMS power of 500W and an output voltage of 120V, this power inverter is suitable for powering a variety of devices while on the go. Additionally, it features built-in protection mechanisms such as over battery voltage protection, short circuit protection, overheating protection, and low voltage input protection to ensure safe and reliable use. Ideal for those needing a compact and dependable power solution while traveling or working in their vehicle.