No prescription is needed for this approved over-the-counter, drug-free way to combat pain. The iTENS merges the proven pain relief of Transcutaneous Electrical Nerve Stimulation (TENS) with technology of your smart phone via Bluetooth. iTENS is a healthcare and technology company that is driven to create iPhone and android device innovations that elevate ones health and/or quality of life. We are confident that the smart phone can be a central device in managing ones health outside of the doctors’ office. iTENS is a spin-off from its parent company that has been manufacturing advanced pain management devices for the last 15 years. The Canadian based company’s overarching goal is to ensure its products deliver effective results with cutting-edge appeal and function. Includes: • iTENS Device with rechargeable lithium-ion battery installed • Wings with Laser printed silver conductive surface • Charging dock with USB charging cable • One set of reusable Gel Pads (according to size). Choice of either a Large or Small set will come with the mentioned Wing size. • Large Wing Span is 2.5" x 6.5" • Small Wing Span is 1.75" x 5.5"