Nakabayashi Digio2 Trackball Mouse MUS-TRLF224GY Small, Wireless, Silent 5-Button Wireless (Receiver Communication) Type I was using this when I went out. I haven't used it very often, so I think it's in relatively good condition. I didn't feel any particular problems with the operation, but it is a used item, so please understand. Please also check the official website for specifications. https://www.nakabayashi.co.jp/product/detail/26497 I will send it in a case for a different product. If you have any requests for price reduction, please use the question section.