ship from Japan This is a trackball, where you roll the ball with your finger to operate the cursor. The thumb operation type allows you to use it in a relaxed state without straining. Ergonomic shape that fits with just a light touch of the palm. It uses a 34mm medium size ball that is just right for thumb movement. The cursor speed can be switched between four levels: 600, 800, 1200, and 1600 counts. Silent switches are used for the left and right buttons, wheel (scroll) button, and count change button. Compatible with Bluetooth Ver.5.1 standard, you can connect to a computer with built-in Bluetooth without a receiver. Stable data communication is possible with a wide communication range of 10m radius. It can also be used with Android-based smartphones and tablets. Quiet: Yes
