Keychron K1 Pro | TKL Mechanical Keyboard | Like New Selling my Keychron K1 Pro. Barely used, like new condition with original box and all accessories. The K1 Pro is a low-profile TKL mechanical keyboard with wireless Bluetooth and USB-C, hot-swappable switches, RGB backlighting, and QMK/VIA support for full custom programming. Works with Mac, Windows, and Linux. Slim, clean design with a solid build. Great for anyone who wants a real mechanical keyboard without the bulk.