All functions can be operated with one button, and it is portable and easy to use. Back Massagers are equipped with high-quality lithium batteries, the massage machine has LED power indicator, do not worry about power failure. Gentle vibration with its gentle vibrating action, this facial massager helps to relax facial muscles, reduce puffiness, and alleviate tension. Easy operation the device is user-friendly, with simple controls that allow you to adjust the intensity and mode settings according to your preference. Rechargeable battery powered by a rechargeable battery, this mini facial gun ensures cordless convenience and eliminates the need for frequent battery replacements. Suitable for people who suffer from neck tension, shoulder tension when sitting at the desk for a long time. Read Less