This Dual-Channel TENS & EMS Device offers 12 massage modes with each one owning 40 strength levels. And it shows current massage mode, strength level and preset time of 2 channel on LCD display. Besides, it supports adjusting time from 5 to 90 minutes.<br> Feature:<br> Dual-Channel TENS&EMS Device<br> Adopt TENS and EMS low-frequency pulse techniques to relieve pains or relax tight spots. And with dual-channel output, it allows use by 2 person or in different areas.<br> Considerate Design<br> It offers 12 massage modes with each one owning 40 strength levels, free to choose to fulfil your different needs.<br> LCD Display<br> You can easily get to know the current massage mode, strength level and preset time of 2 channel.<br> Adjustable Timer<br> You can adjust time from 5 to 90 minutes by press "Timer" button, and long press to be mute or produce buzzing sound.<br> Pocket Size<br> It owns compact and stylish design and comes with belt clip, easy to take it with you anywhere.<br> Specification:<br> Material: ABS<br> Channel quantity: 2<br> Power supply: DC 4.5V 3 * AAA battery (Not included)<br> Waveform: Bidirectional wave<br> Display mode: LCD display<br> Mode: 12 modes<br> Strength levels: 0-40<br> Output frequency: 1~120Hz<br> Output pulse width: 100~250uS<br> Output voltage: 40V±20%<br> Operating temperature: 5℃~40℃ (41℉~104℉)<br> Operating humidity: 15%RH to 93%RH<br> Storage temperature: -25℃~70℃ (-13℉~158℉)<br> Storage humidity: 15%RH to 93%RH<br> Item size: 137* 67* 20mm/ 5.39* 2.64* 0.79in<br> Item weight: 74.4g/ 2.62oz (Only the host)<br> Packing list:<br> 1 * TENS & EMS Device<br> 4 * Electrode Pads<br> 2 * Electrode Cables<br> 1 * User manual