Velbon V4-unit Original box, completely unopened instruction manual, 3/8 conversion screw (explained in detail below) This product allows for overhead shooting (bird's-eye view) and product photography, which are often used by YouTubers. It has a screw for attaching to a tripod, so you can attach it to a tripod or to a tripod screw stand that clamps onto a table, enabling bird's-eye view shooting. Also, by turning the handle, it can be extended and retracted, making fine adjustments easy, and it becomes compact when not in use. The standard screw is a 1/4 inch screw (a common screw found on most cameras), and a 3/8 inch screw is included, which can be replaced by removing the 1/4 inch screw with a coin (see photo). The 1/4 inch screw is the most commonly used screw, while the 3/8 inch screw is used on Manfrotto's higher-end tripods and Chinese-made tripods and ball heads like Leofoto. Basically, these are the two types of screws used for camera equipment, so it can be attached to all tripods, stands, and ball heads. 5/8 inch screws are also often used for microphone stands, but 3/8 to 5/8 conversion screws are also sold for a few hundred yen on Amazon, so it is also recommended for those who use microphone stands or want to use them as microphone stands. Velbon is a Japanese tripod manufacturer, not a Chinese one, and it has the strength to allow bird's-eye view shooting even with single-lens reflex cameras and mirrorless single-lens reflex cameras, so you can use it safely with smartphones like iPhones. This type of bird's-eye view shooting equipment is rarely made by major tripod manufacturers or camera manufacturers (there are similar products for professional-use heavy equipment), and even if they exist, they are usually Chinese-made or simple ones from unknown manufacturers. Even if you search for bird's-eye view shooting on YouTube, you can see that people are struggling and experimenting. Basically, it is almost unused, as you can see in the photos, but I have attached it to a tripod for operational checks, and I have checked the operation for this sale. Also, since it was purchased once, there may be some scratches that are barely noticeable, so please refrain from purchasing if you are looking for a product that is exactly the same as new.