The ProtoArc XK03 folds down small enough to disappear into a jacket pocket, with a genuinely split ergonomic layout — the tradeoff is a compact 65%-style key set and no backlight.
Check price on AmazonQuick specs
166° split V-shape ergonomic design, triple Bluetooth channels (pair up to 3 devices, switch with Fn+Q/W/E), 65%-style condensed layout with no number pad, scissor-switch full-size keycaps, 250 mAh rechargeable battery, folded size 142.9 × 195.3 × 12.9 mm, weighs about 400 g.
Who it's designed for
Frequent travelers and mobile workers who want a genuinely pocketable keyboard for pairing with a phone, tablet, or laptop on the go — not a desktop replacement. ProtoArc's own FAQ notes there's no dedicated Delete key or native Ctrl+Alt+Del, which matters if you're doing IT/admin work.
Worth knowing
- ProtoArc's "up to 6 months" battery claim is standby time; one hands-on reviewer found real active-use battery life closer to a month between charges
- The thin profile means less key cushioning, which can cause finger fatigue on longer typing sessions
- No backlight and no incline/tilt adjustment — it needs a proper desk, not great for lap use
How it compares
- ProtoArc XK03 vs XKM01 Combo — the XK03 is the more pocketable, ergonomic-split option; the XKM01 adds a full 105-key layout with numpad and a mouse, at the cost of being a larger package
- ProtoArc XK03 vs a standard flat travel keyboard — the split design is the reason to pick this over a cheaper flat folding keyboard, if wrist comfort during travel typing matters to you
Bottom line
If you want the smallest possible ergonomic keyboard for travel and don't need a number pad or backlight, the XK03's split design and folded size are hard to beat — just budget for a monthly charge, not the 6-month standby figure.