... automatic protection functions, guarantees the performance of the inverter.4. Having sound and light alarm indicator, ... 55mmUSB Charging current:10AManner of packing:Color boxOutput waveform:Modified sine waveSingle ( with packing):2.73KGConversion efficiency:≥87%Net ... 2007, specialized in inverter, UPS uninterruptible power supply and switching power supply, and various kinds of power adapter, etc. ...