OffsetKey Wireless Split Trackball Keyboard Kit – Dual-Mode, Open-Source ZMK Firmware

OffsetKey – Wireless Split Trackball Keyboard Kit

A fully split mechanical keyboard with a built-in trackball. Place each half where it feels right, control your cursor with your thumb, and skip the mouse. Runs on open-source ZMK firmware — fully customizable.

Features

• Fully split — position each half independently
• Thumb-operated trackball — replaces your mouse
• Dual-mode wireless: Bluetooth + 2.4GHz
• Open-source ZMK firmware — remap keys, adjust trackball sensitivity
• MX hotswap sockets — compatible with standard and low-profile switches
• RGB support

Variants

• Trackball Edition (No Switches/Keycaps) — $119 · Kit only, bring your own switches & keycaps
• Trackball Edition + Switches + Keycaps — $149 · Ready to build ⭐ Most popular
• Split Edition (No Trackball/Screen) — $98 · Core kit, no trackball module
• Split Edition + Switches + Keycaps — $109

FAQ

How does it compare to a split Alice layout?

Alice is one piece with a fixed angle. OffsetKey's two halves are completely independent — set them as wide apart as you need. Better for shoulder comfort over long sessions.

Is the trackball comfortable to use?

Yes. It sits within natural thumb reach so your wrist stays still. Most users stop using a mouse within a week or two. A wrist rest helps.

Can the trackball work as a standalone mouse?

No — it's driven by the keyboard's controller and can't be used independently.

Good for long typing sessions?

That's the point. The split layout keeps wrists neutral and reduces shoulder tension. There's a short adaptation period (1–2 weeks), then it feels normal.

Can it fully replace a mouse?

For most people, yes.

Tip: lower the sensitivity at first to build muscle memory faster.

Does it support low-profile switches?

Yes — standard MX hotswap sockets, compatible with both regular and low-profile MX switches.