TENS Unit Muscle Stimulator: The wireless rechargeable EMS unit muscle stimulator is designed for lower back, neck, shoulder, feet, leg, sciatica, and nerve pain. This machine is portable and so convenient to use Upgraded Wireless & Rechargeable: The electric muscle stimulator machine features wireless function, no complicated cords as the traditional machine. The units' charging case come with an excellent design that can stores and automatically recharging for the devices. 6 Modes & 16 Intensity Levels: The machine for pain relief pre-set 6 modes options included hammering and kneading, meet your need for relieving muscle soreness and fatigue in different ways. The intensity is adjustable from 1 to 16 from weak to strong, and a 15 minutes timer. 4 PCS Hydrogel : The units comes with 4 electrode pads (3.23 x 1.86Inch). Made of high-quality hydrogel and material so that they are soft, washable, and can be used up to 45 times. The pads and the magnetic-buckle both can be stable connected that 't fall down even running Massager for Pain Relief: This wireless TENS unit is an excellent massager for lower back, neck, shoulder, feet, leg, sciatica, and nerve Color:White Material:plastic Package Contents: 1 * TENS Unit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.