This is the rechargeable massager that uses infrared heat and micro vibrations to improve circulation, relieve muscle fatigue, and provide a deep tissue massage. Ideal for use on the hips, back, calves, and thighs, its eight rollers rotate at five different speeds for a customized experience. The massager's two LEDs penetrate deep beneath the skin to help increase blood flow, help reduce swelling, and temporarily relieve discomfort. Charges via AC adapter; a full charge provides up to one hour of power. 8" L x 15" W x 6" D.