... , 1AOutput Power: DC5V, 3A +12 V/2A, -12V/0.2ADisplay Screen: Chinese and English 320 × 240 monochrome touchscreenPrinter Interface: USBCompatible printers ... of left upper limb, right upper limb, trunk, left lower extremity, right lower extremityTest FrequencyThree differenct frequency(20KHZ, 50KHZ, 100KHZ)Electrode Method8 ...