A. This sports accessory is a standard protective frame designed specifically for action cameras. It can perfectly fit specific models of action cameras and provide reliable protection for the cameras. B. In terms of design, the protective frame is carefully crafted to fit the contour of the camera. It doesn't look obtrusive and ensures a stable installation. Its simple and practical design won't add too much burden, allowing you to carry the camera more easily during sports. C. In terms of usage, it is mainly used to protect action cameras. During various intense sports such as cycling, mountain climbing, and skiing, the camera is likely to be subject to collisions and frictions. This protective frame can act as a buffer and protection, effectively reducing the risk of camera damage and extending its service life. Meanwhile, it won't affect the normal use of the camera, and you can still operate the camera smoothly to take pictures and record every wonderful moment. D. Whether you are an outdoor sports enthusiast or a professional photographer, this protective frame is a good helper to ensure the safety of the camera and assist in wonderful shooting.