The lg-3000 professional tens unit works with up to 4 electrode pads to treat your pain areas on the body quickly and effectively. this fda approved tens unit has 3 medically proven treatment modes and is both safe and effective. tens units are used to relieve all types of pain – back, foot, shoulder, neck, virtually any acute or chronic pain. it does this by overriding the pain signal to the brain through electrical impulse. and the best part about it is that the results are immediate. you will know what setting is working best for you. what that means to you is that whether your pain originates in the upper of lower back, neck, foot, shoulders, elbow, virtually every area on your body, you will get fast pain relief – within minutes. tens units has helped thousands of patients get back to the activities that they enjoy – a much better quality of life. the lg-3000 professional tens unit overrides the pain signal to the brain. by sending a comfortable electronic impulse. when the lg-3000 tens unit overrides the pain signal, it “tricks” the brain into thinking their is no pain. this produces fast and rapid pain relief, usually within a minute or two! the lg-3000 tens unit allows you to control and customize the intensity, pulse rate, and pulse width to find the best setting for your pain relief – just like in the therapists office. this is one of the the most cost effective and safest solutions that exists for pain. as a matter of fact, customers have told us they have drastically cut down or eliminated their pain medication and doctor visits with the utilization of this device. simply place the four electrodes on or around the area of pain, turn on the device and adjust the pulse width and rate to what feels good to you. the lg-3000 is small and easily portable. put it on your belt or in your pocket. it works off a standard 9 volt battery. the lg-3000 has a 5 year warranty and satisfaction guarantee.