1. Built-in 3.7V 2000mAh Li-Battery
2. USB cable charge and easy carry, 5V1A
3. Long using time, one full charging, can use for one week
4. RECHARGEABLE & LOW NOISE OPERATION
5. PROFESSIONAL CERVICAL VERTEBRA MASSAGER
6. Skin-friendly material, soft to the touch, comfortable and environmentally friendly
7. 4 Kneading Roller, auto change the direction in one minute
8. 3 Buttons to Operate: Power Button, Heating Button, Speed Button
9. 10mins Auto stop timer function