[Junk Item] There is no chattering, but playback may stop while playing videos. I tested it on a site that tests for malfunctions, but chattering could not be confirmed. I think there should be no problem using it for document creation, but playback may stop if you are playing videos in another tab. Some people have reported the same symptoms, so there may be a solution. The symptoms may not appear for a long time. There are shallow scratches on the O, P, and K keys. Please check the images. Connection type... Wired/Wireless (Bluetooth) Key switch... Pantagraph Keyboard layout... Japanese