Cordless and Rechargeable. This back massager has a built-in rechargeable lithium-ion battery. After fully-charging for approximately 4 hours, it can operate without a power cord for a total of 60 minutes. Hands-Free, Wearable Design. You won’t have to choose between your duty and your health. Wrap the oPillow Plus around your waist, or attach it to your chair, so that you’ll have your hands free to do whatever you have to do! Flat Massage-Head Design. Different from the general round massage heads, flat-head massage imitates palm-pressure therapy. The direction of rotation is automatically changed every 60 seconds to ensure that your body is fully relaxed. Comfortable Massage Experience. The four nodes move simultaneously, with rotational movement that imitates the feeling of a masseur's fingers. A built-in advanced heating function transfers heat to the muscles, accelerating muscle recovery. The intelligent control system automatically adjusts to emit heat at 104℉ - 113℉. A 15-minute timer prevents overheating and ensures that your body does not become uncomfortable after too much use. Improve Your Posture. Sitting in an office chair all day puts great pressure on the back and waist. This massage pillow’s adhesive design allows you to attach it to any compatible chair. It can be used to improve the muscle stiffness caused by long periods of sitting at a desk. You can even use it, unnoticed, while in a conference call! What’s in the box: 1 Massager 1 Charging Cable 1 User Manual