3M Ergonomic Mouse Model Number: EM500GPL Connection Type: Wired This is an ergonomic mouse designed for comfort. It's designed to be held at a natural angle, like shaking hands, without twisting the wrist, reducing strain and helping to prevent tenosynovitis. Purchased in the UK in 2019. Purchase price: £50.32 I used it temporarily when my tenosynovitis was severe, but I haven't used it since it improved. There is some discoloration at the base. There are no operational issues, but please check the photos and understand before purchasing. No box. There is a manual, but it is not in Japanese. (Please check the photos.) Please note that the shipping method may be changed from Yu-Yu Mercari Bin to Raku-Raku Mercari Bin without notice. Instant purchase available. Anonymous shipping.