item 2600-kit comes with the unit, batteries, a pouch, lead wires and hand switch The Chattanooga Continuum is a portable 2 channel stimulator used by therapists in clinics and patients at home to provide electrical stimulation treatments in pain management (TENS) and neuromuscular stimulation (EMS/NMES).Clinicians and their patients can experience improved results by incorporating Continuum into their treatment. It is used to strengthen muscles to help prevent injury, or during recovery following trauma or surgery. -Authorized Chattanooga Dealer -Lowest Price Guaranteed  -FREE & FAST Shipping