【Amazon.co.jp Limited Edition】Kensington Bluetooth SlimBlade Pro Trackball K72085JP Gray Used only once for a usability test, so it's a nearly new, beautiful item. Only wired connection was tested, and there were no issues with connection or operability. I'm selling it because I couldn't get used to the feel of it. Brand: Kensington Color: Gray Connectivity: Bluetooth, 2.4GHz Wireless, Wired Power Source: Rechargeable Included Accessories: Connection cable, Bluetooth USB adapter, USB-A to C adapter