ELECOM DEFT PRO trackball, index finger type. It supports Bluetooth, wired, and wireless connections. 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 was convinced that I couldn't get used to it. It comes with the instruction manual, USB cable, and all other accessories. Please note that the box is damaged upon opening. - Brand: ELECOM - Model Name: DEFT PRO - Type: Trackball - Included items: Instruction manual, USB cable, batteries, receiver unit