... 80VA 4, Continuous working time ≥4hr 5, Output current 0~90mA 6, Frequency of operation 500Hz,2000Hz,3000Hz,4000Hz,5000Hz,6000Hz ... 7, Modulation frequency 0Hz~200Hz 8, Output waveform sinusoidal wave and modulation wave 9, Treatment ... 5Kg(with trolley ) rough weight :21kg 20, Number of output channels 4 channels Computer intermediate frequency therapy apparatus