... sine wave, applying to capacitive, inductive and nonlinear mixed-load,with superior load capacity,Perfect protection fuction:overload, short circuit, ... phase and three phase load at the same time 10.LCD display and buzzer tips . 11.Adopting SMT Craft 12.Elegant ... +GAC/inverter convertionSlow start (output voltage from small to large for 3 seconds)Man-machine interfaceLCD input phase voltage/frequency ...