Price reduced. Please consider. Thank you for viewing this page. I used this mouse twice, but I couldn't get used to the trackball, so I'm selling it to someone who needs it. Ergonomic trackball mouse, providing comfortable operability. Silent click. Can connect to 3 Bluetooth devices. - Model: Trackball Mouse - Color: Black - Accessories: USB receiver - Design: Ergonomic design - Features: Scroll wheel and side buttons * No box or instruction manual included. Thank you for looking.