Powered by RP2040 2MB of flash memory. 16 (4x4 matrix) of low profile keys connected directly to GPIOs Kailh hot-swap switch sockets (for Cherry MX-compatible switches) Per key RGB LEDs driven by an IS31FL3731 PWM LED matrix driver A BOOTSEL button (this can also be used as a user switch) A reset button! Powered and programmable via USB-C Dimensions: approx 76mm x 76mm x 30mm (L x W x H, including switches, keycaps and feet) No soldering required! Comes with CircuitPython pre-installed PMK CircuitPython library Schematic