The Preonic Rev 4 is the newest evolution of Jack Humbert's iconic ortholinear keyboard design. Taking the original Planck concept and giving it a bit more breathing room, the Preonic adds a dedicated number row while preserving the compact, grid-based layout that made the original a favorite. The kit combines a CNC-machined case with a ground-up PCB redesign featuring per-key RGB lighting, integrated underglow, expanded encoder support, an RP2040 microcontroller, and full QMK compatibility.