Review- Walmart EverStart 400 Watts Power Inverter Converter 12V DC to 110V AC- How good is it?

Power your small 110V AC electric appliance from your 12V DC battery. "No manual" design- Digital LED screen to show real time information: Real time output power consumption%; Real time car battery voltage; Realtime warning text will be pop out so end user knows what the real problem of inverter has. Dual 110V household electrical outlets support 400 watts continuous output. Two Shared USB Output 3.1 Amps.

EverStart 400 Watts Power Inverter

Everstart 400 watts Max Continuous Power Inverter (Converts 12V Vehicle DC to 110V AC Power.
The inverter features a compact design that can be easily stored in the glove box, under the seat or in the trunk of your car when not in use. Whether you bringing it along with you while running errands or on your next road trip, this inverter is the ideal companion to help keep mobile phones and electronic devices fully charged from the comfort of your vehicle.
Keep your electronic devices fully charged or powered on the road with the EverStart 400 Watts Power Inverter.
Ideal for everyday use or longer