Cordless Portable Design: Built-in 5200mAh large-capacity battery, can be used for up to 90 minutes. Combined with controller and magnetic mobile power supply technology, the wireless portable design makes light therapy more free. The foldable design can be easily put into a backpack, suitable for various scenes such as traveling, camping Red Light & Vibration 2-In-1: Using 650nm and 850nm dual-wavelength red light, deep into muscle tissue, promote blood circulation, while using the vibration massage function to accurately cover the waist core area, providing deep relaxation and comfort Easy To Use: The controller is simple and convenient to operate, suitable for users of all ages, even the elderly can use it easily. Built-in intelligent timing function, the timer setting range is 5-30 minutes, and the use time can be set according to your needs