TB42: A very low-profile, Bluetooth, 40% mechanical keyboard : r/MechanicalKeyboards
Amazon.com: DURGOD Fusion Mechanical Keyboard - 65% Layout - Doubleshot PBT Cherry Profile - Wireless 2.4gHz / Bluetooth 5.0 / USB Type C - Up to 40 Days Battery Life (Cherry Blue, Navigator) : Video Games
Programmable Mini Mechanical Keyboard Support Via White Resin Case Type-c Hot Swappable Pcb Kailh Hot Plug Base 40 Mini Keyboard - Keyboards - AliExpress