Features: 1: This back massager is equipped with 8 massage heads, which can soothe and rejuvenate sore muscles, and provide deep layers for your neck, shoulders, upper back, lower back, waist, feet, tights, calves, and legs Tissue massage, feet and arms, to help release the pressure on your body parts. 2: Portable and easy to operate, suitable for home, office, and vehicle. 3: 12V power supply, safe at home or in the car 4: Adjustable intensity and 2 massage directions-The neck massage cushion has 3 intensity levels to provide you with a customized deep tissue massage experience. 5: Heating function-built-in heating function to further massage tired muscles and reduce stress. Built-in overheating prevention mechanism, very safe to use. (Can be closed manually) Specifications: Input voltage: 100-240V; 50-60HZ Output voltage: 12V Power: 24W Connect the output port of the power adapter to the plug of the massager. If used in a car, connect the output port of the cigarette lighter to the massager plug. Press the power switch on the control panel. The massager started to work. Press the arrow keys, and the massage head rotates in reverse repeatedly. Press the infrared button to start the infrared heating function. After use, turn off the massager and unplug it. After the product works for 15 minutes, turn off the power by yourself.