Review on 🔌 500W BESTEK Pure Sine Wave Power Inverter DC 12V to 110V AC Car Plug Adapter Converter with Dual USB Ports, 2 AC Outlets, Car Charger - ETL Listed (Blue) by Kevin Pirlet

Tested as a real sine wave inverter, the fan speed is adjustable and load-dependent. The fan noise is audible and not annoying. Poorly. The USB connectors do not match the inverter housing. However, they work, although extra effort is required to connect cables to these ports. See image. Also, the included battery terminal cables are too thin. Warmed up at half load (300 watts). For this reason, I am reluctant to operate the device under full load without a thicker cable. I'll reconsider if Bestek can offer a device with properly oriented USB ports and thicker cables.