Kensington Trackball Mouse

Track ball mouse as seen here: https://www.kensington.com/en-ca/p/products/ergonomics/ergonomic-input-devices/expert-mouse-wireless-trackball/ Still works great, but just not for me. Comes with removable wrist pad and batteries. It originally came with a USB receiver, but it is missing. Bluetooth still works great though, can demonstrate on my laptop.