Two Professional Grade Led Light Therapy: 660nm red light (visible light) it can penetrate the skin epidermis, promote cell metabolism, repair damaged skin, 850nm infrared light (invisible light) it penetrates deeper than red light, can have a thermal effect on muscles, can accelerate blood circulation, Pain relief and relaxation of muscle tension.Ergonomic Design:The red light therapy belt is designed with an ergonomic shape for comfortable wearing and maximum support.Enjoy expensive light therapy in the comfort of your home, about three weeks, free your body from pain, age and injury!Power Options for Convenience: The Red Light Therapy Belt comes with two power cords, one with an adapter and one with a USB interface. The USB cord is for use with a power pack (not included), while the adapter uses wide voltage DC 100-240V, AC 5V2A.Great Gift Idea: The Red Light Therapy Belt is small and light enough to fit in your handbag, making it a thoughtful self-care gift for women and men. Give it as a birthday, anniversary, or holiday gift to help your loved ones experience the benefits of light therapy.Usb Portable Power Bank Can Be Used: Red lights therapy device can be light on in a power cord, also designed it can be use a power bank to work it, power bank can be put in a pocket in the belt, and a USB line was provided in the package, it was easy to take it everywhere when the red lights therapy belt on work.