BSMBB500M Series With side buttons This product is used by pairing with a computer. I purchased it for about 4000 yen and used it for about six months. Due to the usage environment, the scrolling was not smooth, which was inconvenient, so I stopped using it afterwards. (As stated in the manual. Used on a steel desk.) Although it's a different product, I have the original packaging that fits, so I will send it in that. (Photo 7) Connection type: Wireless (Bluetooth) Power supply: Battery-powered Other: Silent