This Dual-Channel TENS Device offers 24 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 TENSDevice Adopt TENS low-frequency pulse techniques to relieve pains. 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 6 massage modes with each one owning 4 different options and 20 strength levels, free to choose to fulfil your different needs. LCD Display You can easily get to know the current massage mode, strength level and preset time of 2 channel. Adjustable Timer You can adjust time from 10 to 60 minutes by press "T" button, and it increases 10 minutes by each press. Pocket Size It owns compact and stylish design, easy to take it with you anywhere. Long Lasting Battery With built-in 200mAh battery, you can use it for a long time, and the remaining power of it is displayed on LCD screen. Specification: Material: ABS Channel quantity: 2 Power supply: DC 5V/1ABattery capacity: 200mAh Display mode: LCD display Mode: 24 modes Strength levels: 0-20 Item size: 95* 55* 10mm/ 3.74* 2.17* 0.39in Item weight: 62.1g/ 2.19oz (Only the host) Packing list: 1 * TENS Device 4 * Electrode Pads (4 Medium) 2 * Electrode Cables (2 * 2-in-1 cables) 1 * USB Cable 1 * Pad Holder 1 * Power Adapter 1 * User Manual 1 * Acupoint Diagram