Logicool G PRO X TKL LIGHTSPEED Wireless Gaming Keyboard, Tenkeyless, Mechanical, Tactile (Brown Axis), GX Switches, with Dedicated Case, Keyboard Bluetooth, Silent, Japanese Layout, LIGHTSYNC RGB, Detachable Cable, G-PKB-003WL-TCBK, Black, Wireless, Domestic Genuine Product I purchased this new on Mercari and used it for about two weeks. I do not have the receipt or proof of purchase.