The innovative 4 prong mechanism kneads neck and shoulder muscles to ease muscle tension. Hands-free operation makes it simple to enjoy a massage while relaxing or doing other activities. Take the reins on neck pain relief by pulling down on the comfort flex handles for deeper-kneading intensity or loosen your grip for a more relaxing massage. Turn up the heat by turning on the heat therapy and feel your aches and pains blissfully melt away.Features / benefits: Soothing heat, 4 prong kneading massage, high/low intensity, comfort flex handles, integrated controls, hands-free straps, runtime up to 70 minutes for each full charge, rechargeable battery powered with lithium battery capacity: 2000mAh. Battery Type: Lithium Ion Measurements: 2.83 Height/Inches, 32.28 Length/Inches, 4.33 Width/Inches Base Material: 95% Polyester, 5% Other 5% Or Less Care: Wipe Clean Country of Origin: Imported