I'm selling this mouse because I tried using an index finger mouse but couldn't get the hang of it. I've only tried it a few times, so it's practically new. It's been stored in a drawer. Instant purchase is fine. I hope someone who can use it will take it! This trackball mouse offers precise point tracking and supports Bluetooth, USB, and wireless connections. - Brand: ELECOM - Model Name: DEFT PRO - Color: Black - Connectivity: Bluetooth, USB, Wireless - Compatible OS: Windows 10, Windows 11, Windows XP, Windows 8.1