K2 (with Red switches K4 key caps and pbt double shot white pudding caps) & K4 (with blue switches and YMDK OEM thick PBT keycaps). It's really hard finding key caps with
Keychron K2 x YMDK Gray Beige PBT : r/MechanicalKeyboards
Keychron K2 review: an excellent wireless mechanical keyboard - 9to5Mac
Keychron K2 Wireless Mechanical Keyboard for Mac and Windows
Keychron K2 V2 review: A great introduction to mechanical keyboards | iMore
Keychron K2 version 2 review - still one of the best Mac keyboard options -
Answer to the Confusions about Our Double-Shot Keycaps
Amazon.com: Keychron K2 75% Layout Bluetooth Wireless/USB Wired Mechanical Gaming Keyboard Mechanical Blue Switch, Compact 84 Keys Computer Keyboard for Mac & Windows : Video Games
Custom Key Caps for My Keychron K2 Keyboard | Chris Hannah
Keychron K2 Pro QMK/VIA Wireless Mechanical Keyboard