Tens Machine Unit Electric Massager Pulse Muscle Stimulator Back Therapy Pain Relief with 4 Electrode Patches Feature: 1. The application of digital technology for comprehensive physical therapy ensures the accuracy and efficacy of physical therapy. 2. Equipped with large LCD display, which can display intensity, function, mode, physical therapy, time, body meridian acupoint map, etc. 3 includes. Lightweight and portable, you can easily put it in your bag and use it whenever you want. Specification: Material: ABS Power supply mode: 3 AAA batteries (no included battery) Applicable Parts: Shoulder, neck, waist, back, legs, arms, feet, etc. Function: Dredge the whole body, improve cervical spondylosis, improve lumbar muscle tone, relieve body pains Package List: 1 x Muscle Stimulator (no included battery) 4 x Electrode patches 2 x Electrode Wire 1 x Manual Note: (1) If you want to change the physiotherapy mode during the treatment, the intensity will be automatically lowered to 0 level, and you can adjust the appropriate intensity at this time. (2) During the treatment, if you want to change the location of the physical therapy, that is, change the position of the electrode, you must first press the power button, then turn off the machine, and then follow the steps above . (3) When the physical therapy stops, please press the power button first, then remove the electrodes after shutting down. (4) Remove the electrode from the host, pull the plug part, do not pull the wire. (5) The battery should be removed if not used for a long time. Please allow 1-3 cm differences due to manual measurement, thanks Understand due to the light irradiation or computer display difference, so I can't guarantee pictures and real color is 100 percent the same.