Digital Therapy Machine is made of ABS plastic. Its power is dc4.5v, and it runs on 3AAA batteries for travel. Batteries run for 45 hours continuously in normal operation. It also runs on a USB power chord that can be plugged into your computer or into any outlet in your home or office (Batteries NOT Included).Its frequency is 1-330 Hz. It consumes less than 180mw. Size of the device is 153mm x 70mm x 18mm.The LCD Screen light is up and shows a human body diagram, which indicates proper placement of the pads for each mode selected.It is used to curestiff shoulder, end neural paralysis, neuralgia, shank ache, whole body fatigue, stomachache, bad cold, cervical vertebra neck, ache, periarthritis, toothache, high blood pressure, low blood pressure, energy failure, weak sexual ability, irregular menstruation, various acute chronic disease.