... AC or 220V DC 220V, 50Hz, voltage, frequency stability, noise of pure sine wave AC power. The product has a ... ) Manual bypass fail-safe design to avoid wrong operation5) Output and battery insulated completely6) Full protection,input low,high voltage ... bypass to inverter)displayAC input voltage,frequency;DCinput voltage ,current; output voltage, frequency current, load etc.alarmDC input high or ...