8 kneading rollers.Soothing heat, easy to turn on or off.2 massage directions. One button to change the direction of massage rotation.Can be used for neck, shoulders, back, waist, body, arms, legs and feet.The convenient arm loops allow you to control how much pressure is applied to your body.This massager has an Auto-off feature after 15 minutes of use. Note: You can push the power button again and it will turn on for another 15 minutes. It is not recommended to use the massager for more than 45 minutes.An AC wall adapter and a car adapter are included in the package, so you can conveniently take the massager anywhere with you, at home, to the office, or in the car.Note: This is not cordless. There is no battery in it.  It must be plugged in to work.