This is an Elecom Bluetooth trackball. I bought it to try out its feel, as it boasts ball bearings. As a result, the ball's smoothness was definitely much better than the one made by Logi○tech. However, when moving the cursor a long distance and rotating the ball a little more forcefully, it makes a rattling sound, possibly from the bearings, which makes it a bit difficult to use in quiet places. In fact, when I was using it in the living room, my family complained that it was a bit annoying, so I'm putting it up for sale. Therefore, I only used it for 1-2 days, and all accessories are included, but I will remove the batteries due to the risk of leakage during shipping. Aside from the rattling sound, I think it's a good trackball, so I hope to pass it on to someone who can use it in an environment where they don't have to worry about the surroundings, such as a private room. Thank you.