TENStem Eco Basic is a transcutaneous electrical nerve and muscle stimulator used to relieve pain and muscle spasms. This device offers 4 free programs for its own setting and 12 pre-set programs like burst, frequency modulation, muscle stimulation, dynamic stimulation, and HAN stimulation. It is ideal for pain treatment at home. Digital 2-channel TENS unit Pain relief programs: burst, low/high frequency, frequency modulation Special HAN stimulation program for highest pain relief Locking keypad function for improved safety Retrievable operating parameters: total operating time, average used intensity No skin irritations with stimulation Integrated AKS (controlled output short circuit) : for enhanced skin protection Acoustic signal to be switched ON or OFF Belt clip for easy therapy at home Detailed instruction manual with pictures of electrode positioning A box contains: 1 x TENStem eco basic device 1 x belt clip 2 x connecting cords 4 x pads