Features: Versatile Pain Relief: designed for use on the waist, back, belly, and other areas, providing targeted treatments for a variety of discomforts. Comfortable and Convenient:: design allows for hands-free use, making it easy to incorporate into your daily routine. Lightweight and Portable: lightweight, the belt is easy to take with you on the-go. Compared to blue light, red light is on the opposite end of the light spectrums. Red light is delivered in the mid-660 nanometer range, while infrared is in the mid-850s. Due to its range and longer wavelengths, infrared is invisibles to the human eye. Notice: 1. Actual color may be slightly different from the image due to different light effect 2. Please allow 1-3cm deviation due to manual measurement Description: Size: 18*130cm