The Veridian model 22-040, TENS Wired Pain Management Solution has electronic nerve stimulation to provide temporary pain relief to shoulders, waist, back, neck, arms, and legs. Used with a 2 or 4 pad wired application. 8-Pulse frequency modes and 18-intensity levels. Self-adhesive gel-style electrode pads that you can reuse up to 50 uses. Has a programmable timer, 10-60 minute therapy sessions. Automatic shut-off, dual channel output, and a rechargeable internal battery. Includes: Tens control unit, 4 electrode pads, USB cable, AC power adapter, storage case, detailed English/Spanish instructions and warnings, and a replacement electrode order form.