ProtoArc XK04 Compact Foldable Bluetooth Keyboard

Name: ProtoArc XK04 Compact Foldable Bluetooth Keyboard
Brand: ProtoArc
SKU: B0D9PT9884

A pocket-sized two-fold Bluetooth keyboard for mobile typing when compact carry matters more than dedicated shortcut keys.

Quick verdict

Buy the XK04 for light, pocketable phone or tablet typing; skip it if you rely on direct Escape and F-row shortcuts.

Current US price snapshot

$34.99Checked Oct 5, 2026

Amazon US: Black; regular new-item price from ProtoArc, shipped by Amazon. Prime member pricing may be lower. Price may change.

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Keyboards & Mice / product analysis
ProtoArc XK04 review: a pocket-size keyboard with shortcut tradeoffs
The Black ProtoArc XK04 weighs 221 grams and folds into a compact two-fold package. It suits phone and tablet typing, but Escape and F-row access take extra key presses.

Full specifications

Documented facts

Folded size and weight: 145.9 × 103.5 × 17.9 mm; 221 g (7.8 oz)ProtoArc
Device connection: Bluetooth Low Energy with three device channelsProtoArc ProtoArc
Shortcut access: Escape and F1–F12 use Fn+Shift combinations; direct Esc returns a grave accent and direct F1–F10 keys return number characters.ProtoArc
Package contents: XK04 keyboard, USB-C charging cable, collapsible phone holder and user guideProtoArc
Model, color and Amazon ASIN: ProtoArc XK04; Black; Amazon US ASIN B0D9PT9884ProtoArc PartnerBoost

Sources (5)

Trace the evidence

Linked sources are the underlying evidence. Fit judgments and explanations marked “Our analysis” are our interpretation.

Official specification
ProtoArc · ProtoArc XK04 Foldable Keyboard product page ↗
Accessed 2026-10-05
Official specification
ProtoArc · ProtoArc XK04 FAQ ↗
Accessed 2026-10-05
Reviewer observation
Reddit / r/SamsungDeX · ProtoArc XK04 Foldable bluetooth keyboard Review ↗
Accessed 2026-10-05
Official specification
PartnerBoost · ProtoArc XK04 Black Amazon US destination (B0D9PT9884) ↗
Accessed 2026-10-04
Official specification
Amazon · ProtoArc XK04 Compact Foldable Bluetooth Keyboard: Amazon US price ↗
Accessed 2026-10-05