Almighty Hot and Cold Body Massager by BodiSpa. Rechargeable. Body massager features: solid head, stylish design. Deceptively powerful. Engineered for strong and continuous stimulation. Indicator panel controls massage intensity and temperature. Control dials simple one finger control of vibration intensity or hot/cold. Cordless handle. Rechargeable Lithium Ion battery. 45 minutes of enjoyment. Why hot? 104 to 120 degrees Fahrenheit. Relaxation of tense overworked muscles. Relief from arthritis and joints and muscle pain. Faster recovery time from sports injuries. Why cold? 50 to 59 degrees Fahrenheit. Decrease muscle pain. Reduce muscle spasm. Decreases fluid build up swelling in injured body parts. 16.5 inches long by 4 inches wide. AC charger included. Phthalate free ABS plastic. Neutral scent.