Groupon has this Santamedical TENS Unit Electronic Pulse Massager for an excellent price of $7.99 (Reg. $29.95).

Benefits

The massager can be placed on arms, neck and shoulders, back, and legs, as well as tired joints for quick and relaxing pain relief. The electric pulses it produces awaken sore or numb muscles and work well in relieving stiffness, soreness from over-training, and chronic conditions such as carpal tunnel syndrome and muscle spasms.

Convenient Features

• Completely adjustable speed and intensity with easy-to-use controls
• Preset programs or manual mode
• 10–60 minute timer
• Auto shut-off feature
• LCD display is backlit for low-light conditions