Four massage heads fit closely to the curve of the neck. Ergonomic design, U-shaped neck ring, close to the neck massage more in place 20 levels of intensity, freely adjustable to enjoy different massage pleasure Built-in lithium battery, fast charging, , 30 minutes a day easy to have a healthy cervical spine Product name:cervical massager Rated power:3W Number of massage heads:4 massage heads Rated voltage:3.7V Battery capacity:700mAh Hyperthermia temperature:42℃ Colour:White Material:Plastic Package Contents: 1 * Cervical Spot Massage 1 * Remote control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.