The Samlex America PST-120-12 pure sine wave inverter is perfect for powering or charging small electrical devices. AC devices can be plugged directly into the standard outlet and most electronics can be plugged into the USB port. The 120 Watts rating gives it enough power to run devices such as external hard drives, AC charging adapters, radios, cd players, mp3 players and much more. The USB port gives you even more flexibility for powering up your devices such as tablets, phones, GPS units, etc. Please be sure of how much power you need before plugging your device into the inverter. Most devices will tell you their power rating on the outside of the device or in the user manual. The inverter comes with a DC power cord that allows you to plug into a standard 12 Volt cigarette lighter style plug. The PST-120-12 is protected by a mini automotive blade fuse rated for 32V and 15 Amps. The inverter is ETL listed and is approved for use in hospitals and applications requiring UL60601 compliance.