It's written as pure sine wave inverter but that's not the case. The pure sine wave ups is different than this. It's square wave inverter which they are selling as sine wave....

The image shown is a pure sine wave inverter. The model number shown is also for sine wave inverter. But the description says it is square wave inverter. And I received a trapezoidal digital inverter. Never gave a replacement. Gave it single star because I couldn't give it any lesser