Type-C Bluetooth Mouse Design

I need a compact Bluetooth mouse engineered from the ground up with four physical buttons, a smooth scroll wheel, and a USB-C port for both charging and optional wired use. Beyond the standard right- and left-click, the two extra buttons have to ship pre-mapped to volume control (up / down or mute / un-mute) yet remain fully re-programmable through companion software or firmware so users can assign any shortcut they like later on.

The build should feel as solid as today’s premium portable mice, keep latency low, and work cross-platform without separate drivers. I’m open to Nordic, Cypress, or similar Bluetooth LE chipsets as long as you hit excellent battery life and achieve seamless reconnection after wake-up. USB-C power management and over-the-air firmware update capability are highly desirable.

Deliverables
• Complete enclosure and PCB design files (STEP, Gerber, BOM).
• Firmware enabling Bluetooth HID, wired HID over USB-C, and button remapping with preset volume controls.
• A simple cross-platform configuration utility (desktop app or web-based) that lets users change button functions and update firmware.
• Two fully functional prototypes tested for click reliability, scroll precision, and Bluetooth range.

I’ll validate the work once the prototypes demonstrate stable pairing, instant volume adjustment from the side buttons, and successful custom remapping. Let me know your approach, preferred components, and estimated timeline.