It is an accurate and easy to use handheld acupuncture or trigger point locator with an effective push-button stimulation function that can be used for immediate treatment of the point or area as soon as it is detected. It has a similar function to a T.E.N.S. device, which stimulates nerves electrically by passing current through the skin to relieve some types of pain such as chronic, acute and post-operative pain. An ideal tool for home use. Powered by 9V dry battery.