This Dual-Channel TENS&EMS Device offers 28 massage modes and 20 strength levels. And it shows current massage mode, strength level and preset time of 2 channel on LCD screen. Besides, it supports adjusting time from 10 to 60 minutes. Feature: Dual-Channel TENS&EMS Device Adopt TENS and EMS low-frequency pulse techniques to relieve pains and relax tight spots. And with independent dual-channel output, it allows use by 2 person or in different areas and of different modes and intensity in channel A and B. Considerate Design It offers 28 massage modes and 20 strength levels, free to choose to fulfil your different needs. Touch Screen You can easily get to know the current massage mode, strength level and preset time of 2 channels. And you can also use touch pen to change modes or lock/unlock buttons and screen, etc. Adjustable Time You can adjust time from 10 to 60 minutes by pressing "T" button, and it increases 10 minutes by each press. Long Lasting Battery With built-in 300mAh battery, you can use it for a long time, and the remaining power of it is displayed on the screen. Specification: Material: ABS Channel quantity: 2 Input voltage: AC 100~240V Output voltage: 5V Output current: 500mA Power: 2.5W Default time: 20min Battery capacity: 300mAh Display mode: Touch screen Mode: 28 modes Strength levels: 0-20 Item size: 135* 68* 12mm/ 5.31* 2.68* 0.47in Item weight: 119.6g/ 4.22oz (Only the host) Packing list: 1 * TENS Device 6 * Electrode Pads (2 Large, 4 Medium) 2 * Electrode Cables ( 4-in-1 cable, 2-in-1 cable) 1 * USB Cable 1 * Pad Holder 1 * Power Adapter 1 * Touch Pen 1 * User Manual 1 * Acupoint Diagram