This is the ELECOM DEFT PRO trackball, an index finger type, from Elecom. It can connect via Bluetooth, wired, or wireless. I just bought it last month. It's very convenient, but in my case, I've injured the tendon in my thumb before, and after using it for about an hour, I realized I couldn't get used to it. It comes with the manual, USB cable, and all other accessories. Please note that the box is damaged from when it was opened. - Brand: ELECOM - Model Name: DEFT PRO - Type: Trackball - Included Items: Instruction manual, USB cable, batteries, receiver unit