Tens Socks Electronic Pulse Massager package includes: Tens device, 2 socks, 2 cables for socks, 8 Refill pads, 2 cables for pads, 4 batteries, operating manual. A device normally only available in sessions with a physical therapist or chiropractor. It is a compact, portable, micro-computer-controlled device. It may help temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back, neck, arm, and leg due to strain from exercise or activities. It is also intended for symptomatic relief and management of chronic, intractable pain and relief of pain associated with arthritis, increase blood circulation in the healthy muscles for lower extremities.Product Specifications Five Auto Modes (stimulation programs) Three selectable massages High frequency stimulation to relieve pain quickly Lcd shows massage style, intensity and time remaining Power: DC6V (4 Aaa batteries) Dimension: 8"" x 2"" x 1"" plus attachment pads. Fda 510K approved K113544