Millions of people suffer with chronic pain conditions and find themselves seeking adequate relief with minimal side effects. Transcutaneal Electrial Nerve Stimulation better known as TENS therapy uses electricity to stimulate nerves in an effort to ease pain and provide relief. Electrotherapy is accomplished with pulses of electrical current set at specific frequencies. Physical therapists are excellent sources for instruction on using a TENS machine, but once your desired settings are found, pain relief becomes available anywhere anytime. These robustly compact TENS units are portable for travel and can be used whenever pain strikes.