Do you need prescription strength painkillers? A TENS unit muscle stimulator and electric massager, which can relieve pain, can be used as a muscle massager or shoulder massager, provide wrist tube relief, and can be used as a muscle relaxant (very suitable for muscle recovery) More than 1 million 7000 devices have been sold: the leader of consumers' favorite back pain relief devices and physical therapy devices, which can provide instant and lasting drug free muscle pain relief for back pain, neck pain, tennis elbow and bursitis Leader since 2008: For more than 10 years, medical professionals have been most fond of TENS equipment, which is used to provide drug free back pain relief and treat common diseases such as neck pain, carpal tunnel relief, arthritis, shoulder, knee, elbow, leg and foot pain Immediate pain relief: TENS machine is equipped with multiple TENS treatment modes, which can immediately relieve muscle pain. It is a first-class leader with all the electrotherapy machines and muscle electric massagers needed for TENS treatment. The pulse amplitude or intensity level can be adjusted in 10mA increments within the range of 0-100mA, controlLED by the corresponding knob on the top of the device, and applicable to two channels Dual channel TENS unit: TENS 7000 TENS unit provides TENS treatment, which is a muscle stimulator, nerve stimulator and electric massager. It has independent dual channels and can control four (4) TENS unit pads (electrodes) for targeted pain relief Note: Please refer to the user manual and guide before use. The pulse amplitude or intensity level can be adjusted in 10mA increments within the range of 0-100mA, which is controlLED by the corresponding knob on the top of the device and is applicable to two channels. Use electrodes in pairs. When one electrode is used, the device will not work. The treatment is timed with the device, and the device will automatically close after a certain set time Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.