Check the listing for details. Unit Muscle Stimulator, Electronic PMS Pulse Massager Machine for Shock Physical. Color: Black, Condition: New. Listed at 39.99 USD. TRUE INDEPENDENT TENS UNIT: Choose between 24 modes and 20 intensity levels on each channel individually, for a wider range of muscle stimulation, pain relief, and body recovery.USB-C PORT FOR FAST 40 MIN FULL CHARGE: PMS muscle stimulator, up to 20 hours of continuous use per charge. Easy to read LCD backlit screen with enlarged icons for a better operating experience. USB-C charging cable included.DRUG FREE PAIN RELIEF: Safe TENS therapy delivers back sciatica nerve pain relief among other common ailments like neck pain, carpal tunnel, arthritis, shoulder, knee, elbow, leg and foot pain.MUSCLE RECOVERY DEVICE: Portable, fast and easy body muscle relaxation by electrical pulses to any desired area. Home TENS unit personal pain relief without medication or expensive visits to your physician.COMPLETE KIT: Includes the Space Gray TENS PMS Unit, charging cable, 12 matching Electrode pads in large, medium and small size (2 pairs each size), 1 pad holder and a portable case for travel protection.