Purchased new from the official website in October 2024. Selling because I'm switching to a US layout. The box and all accessories are included. Batteries are included as a bonus (replaced about two weeks ago). The HHKB Studio already has a quiet and high-quality typing feel, but the dedicated vibration absorption mat further enhances the quality. The weight has increased slightly, but it's recommended! Also, I'll include a storage case, although it's not a dedicated product. I've used it with care, so there are no noticeable scratches or stains, but please refrain from purchasing if you are sensitive to used items. Bird Electronic HHKB Studio dedicated vibration absorption mat KMG-ST: equivalent to 3,000 yen co2CREA storage case: equivalent to 2,700 yen Keyboard layout...Japanese Key switch...Mechanical Connection type...Wired/Wireless (Bluetooth)