15SetupUnpack the box of the product, take the product and accessories out, and snap the connect unit onto theelectrode pad.ON/OFF/Screen lockIntensity IncreaseCountdown TimerBattery IndicatorLCD DisplayIntensity DecreaseIntensity IndicationA/B ChannelOutput A Channel USB Port Output B ChannelPauseIntensity IncreaseIntensity DecreaseCycle FunctionScreen lock