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ProtoArc Foldable Compact Keyboard for Phone and Tablet, XK04 Pocket-Sized Travel Bluetooth Keyboard with PU Leather Cover, 3 Device Workflow for On-the-Go Typing - Blue
ProtoArc

ProtoArc Foldable Compact Keyboard for Phone and Tablet

Bottom line: The ProtoArc Foldable Compact Keyboard for Phone and Tablet ($30.39 on Amazon as of 2026-10-06): Folds to palm size at just 7.8 ounces, pockets easily; main trade-off: spacebar sits near the folding hinge, so 2-3 days of adjustment.

$30.39

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Buy on Amazon — $30.39 Compare to similar gaming peripherals

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For keyboards, mice, headsets and other PC peripherals, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Folds to palm size at just 7.8 ounces, pockets easily
  • ✓ Pairs 3 devices over Bluetooth 5.1 with dedicated switch keys
  • ✓ 150+ days standby from a 2-hour USB-C charge
  • ✓ PU leather cover shields keycaps from scratches in a bag

Cons

  • ✗ Spacebar sits near the folding hinge, so 2-3 days of adjustment
  • ✗ 10.76 x 4.07 inch layout is cramped next to a full-size board
  • ✗ 0.55-inch keycaps are smaller than standard desktop keys
  • ✗ Built for short notes and emails, not all-day document work

Manufacturer description

The ProtoArc XK04 folds down to a palm-sized slab that weighs just 7.8 ounces, so this Bluetooth keyboard disappears into a jacket pocket or laptop sleeve instead of claiming space in your bag. Unfolded it measures 10.76 by 4.07 inches with 0.55-inch keycaps, a footprint built for airplane tray tables and crowded cafe counters rather than a full desk setup. The PU leather cover wraps the keys when folded, shielding them from scratches while giving the ProtoArc a more finished feel than bare plastic travel boards. Bluetooth 5.1 holds a stable link out to 33 feet and pairs three devices at…

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SpecPicks Verdict

SpecPicks scored ProtoArc Foldable Compact Keyboard for Phone and Tablet using a rating × review-volume × price-fit model applied to published specs and reviews across the gaming peripherals category. ProtoArc's gaming peripherals lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for gaming peripherals of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How many devices can the ProtoArc XK04 connect to at once?

Three. Bluetooth 5.1 holds all three pairings simultaneously, and dedicated keys switch between an iPhone, iPad, or Android tablet without re-pairing. Range is rated at 33 feet.

How small does it fold, and how much does it weigh?

It folds to a palm-sized, pocketable slab and weighs 7.8 ounces. Unfolded, the typing surface measures 10.76 by 4.07 inches with 0.55-inch keycaps.

How long does the battery last between charges?

ProtoArc rates it at 150-plus days of standby, helped by auto-sleep. A full recharge takes about two hours over the included USB-C cable, and the indicator turns green when charging is done.

Is there a learning curve with the compact layout?

Yes. ProtoArc notes the spacebar sits near the folding hinge, so expect 2-3 days to adapt your typing habits. Check the 10.76 x 4.07 inch unfolded dimensions before buying.

Key Features

  • Palm-sized Folding Design with PU Leather Cover: Only 7.8 ounces – folds to a small size for carrying. The soft PU leather exterior protects against scratches and adds a premium feel. Slips easily into any pocket, bag, or briefcase. Perfect for business travelers, students, and digital nomads who need a keyboard wherever they go
  • Compact Layout: Unfolded size: 10.76"×4.07", keycaps 0.55". This mini keyboard saves desk space and fits on tight airplane trays or crowded cafe tables. Note: Due to the compact design (including the spacebar near the folding hinge), it may take 2-3 days to adapt your typing habit. Best suited for phone/tablet users writing emails, messages, and short notes. Check the dimensions before purchase
  • Bluetooth 5.1 with Stable 33ft Range: Connect to up to 3 devices (iPad, iPhone, Android tablet,etc) simultaneously. Switch between them with dedicated keys – no re-pairing, no cable juggling. Great for replying to Slack on your phone, then typing meeting notes on your tablet without missing a beat(Tip: Turn on power before pairing)
  • 2-hour Charge, 150+ Days Standby: Fully recharges via included Type-C cable (charging indicator turns green when done). Auto-sleep feature maximizes battery life of months of standby. No hunting for outlets during long trips. Perfect for remote work, travel, and daily carry
  • Your Reliable Partner for Mobile Creation: Draft a proposal in a café, journal in a park, or fine-tune a spreadsheet on a train. This pocket wireless keyboard turns any location into a productive workspace

Full Specifications

BrandProtoArc
ColorBlue
MaterialAcrylonitrile Butadiene Styrene
Model NameXK04
Unit Count1.0 Count
Switch TypeClicky
ConnectivityBluetooth
Model NumberXK04
Power SourceBattery Powered
CompatibilitySwitch, Android, iOS
Built-In MediaFoldable Wireless Keyboard, Phone Stand, USB Cable, User Manual
Number of Keys65
Connection TypeWireless
Keyboard LayoutQWERTY
Mfr Part NumberXK04
Special FeatureFoldable, Lightweight, Portable, Rechargeable, Silent
Antenna LocationBusiness Travel, Mobile Typing, Phone Messaging, Tablet Note-Taking
Hand OrientationAmbidextrous
Compatible DevicesLaptop, Smartphone, Tablet
Enclosure MaterialAcrylonitrile Butadiene Styrene
Full listing titleProtoArc Foldable Compact Keyboard for Phone and Tablet, XK04 Pocket-Sized Travel Bluetooth Keyboard with PU Leather Cover, 3 Device Workflow for On-the-Go Typing - Blue

Ready to buy?

ProtoArc Foldable Compact Keyboard for Phone and Tablet, XK04 Pocket-Sized Travel Bluetooth Keyboard with PU Leather Cover, 3 Device Workflow for On-the-Go Typing - Blue is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $30.39

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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ProtoArc Foldable Compact Keyboard for Phone and Tablet, XK04 Pocket-Sized Travel Bluetooth Keyboard with PU Leather Cover, 3 Device Workflow for On-the-Go Typing - Blue
$30.39
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