I've used this for about two years. I'm selling it because I'm replacing it. It was working without any problems until recently. I used it with a separately purchased coil cable, so all the accessories other than the main unit were kept unopened. After purchase, the outer box was partially crushed from the time of arrival due to shipping from overseas. The main unit was fine and worked well, so I used it as is. 75% layout, open-source customizable mechanical keyboard. - Model: Keychron Q1 - Layout: 75% - Compatibility: Dual compatibility - Firmware: Open-source firmware - Design: Double-gasket mount design - Body: CNC aluminum body - Sound absorption: Sound-absorbing foam Thank you for looking.