Because of chronic muscular pains me were prescribed different, expensive equipment in the course of the disease. Because to me the effort had become too big, always to order new recipes and equipment, I tested several devices Tens, so bought. All tested so far had one major drawback: when the battery or battery voltage or the loosening of a cable, during operation, there was very unpleasant electrical shocks. As far as me this was possible, I have the equipment reclaims. The Promed EMT-6 I have been able to make only positive experiences. The device is protected against unwanted power surges. Although even a plug detached from the electrodes, there is no direct contact with the skin, because these connections are fully insulated. About each a scroll wheel on the device side, the intensity dosing very well. Another advantage over devices in which this is possible only through repeated keystroke with some annoying beeping sounds. What I like less, are the rather long cable, which are expected to be slightly thinner too, so you can wear them well under clothing. This should, however, can be exchanged if necessary. One of the two free programs that I have adapted to the muscle pain is well layered, sodas the excessive tone subsides. The other programs I use rarely. Technically a sophisticated device, particularly for chronic pain. The health insurance companies refund the purchase price, I discovered after the event on the manufacturing side. MfG other