The BT75 aims on delivering a polished, seamless experience. It includes a Nordic Semiconductor "BLE" module that delivers high performance, and excellent range, even in metal cases! Features: Bluetooth connectivity (Works in metal cases!) Compatible with BT4 or BT5 with BLE Connect to up to 5 devices Weeks of battery life (1200mAh battery included) Fits into most 75%  Tray Mount cases Standard ANSI layout Solder pads for optional split back space Kailh hotswap sockets USB C USB pins broken out With this V2 improved version, this PCB features: More layouts! You can now have arrow keys without a 2u left shift Single colour key backlighting! (solder pads for Soldered boards, SMD LEDs preinstalled on hotswap) 12 LED RGB underglow on all models Support for up to 3 separate encoders on all the 65 and 75 boards (2 on the 60) Power switch in the reset well (which fails to always ON even if broken off) Improved reset button that is more reliable Reset jumper (you can reset it from the top of the plate without needing to pull the keyboard apart) Jumper to disable the charge led for extra stealth   Also available in a 65% and 75% size! Check out our all new firmware GUI on our website The zmk-config repos for these boards are available here   Worldwide Vendors: Mechboards (UK) UpgradeKeyboards (USA) KeyGem (EU) RNDKBD (CA)