... distortion 7) V, A, W, Hz display accurately, digital, simultaneously8) With full protections (over voltage, over load, ... User friendly control panel10) Tenfold peak inrush current11) Timer is substantive, preset from 0 to 16hMain applications:1 ... frequencyBasal: adjustable 4763Hz (400Hz option)Fix :position switch for 50Hz220V,60Hz110V,60Hz120V settingLoad stability±1%Frequency stability ...