Does it work with an iPad or iPhone?

Yes. It pairs over Bluetooth with tablets, laptops and smartphones, and three channels let you switch between them.

How long does the battery last?

ProtoArc rates standby at up to 150+ days with auto-sleep. Actual typing time between USB-C charges depends on use.

Is there a backlight?

No. The keys are not lit, so you need some ambient light to type.

What comes in the box?

The keyboard, a USB-C charging cable, a collapsible phone holder and a user guide.

Does it have a number pad or media keys?

No number pad. Media and volume controls are secondary functions on the Fn row.

Is the ProtoArc XK04 worth it?

It is a low-risk travel keyboard. Buy it for occasional phone and tablet typing, not as a replacement for a laptop keyboard.

Where is the ProtoArc XK04 cheapest?

At eBay, for $15.00, 62% under what the other stores charge, as of our latest check.

Where can I buy the ProtoArc XK04?

4 stores we checked sell it, including ProtoArc, Sears, Amazon, eBay.

ProtoArc XK04 Price History: $15.00 at eBay, 62% Under Others

What reviewers say

Owners treat the XK04 as a travel accessory rather than a daily driver. They like the pocketable fold and multi-device pairing, and accept the cramped keys as the price of portability.

What people mention

PortabilityPraisedOwners say it folds to palm size and disappears into a bag or pocket.
Key feelPraisedScissor switches are described as more stable and less mushy than rubber-dome foldables.
LayoutCriticisedThe 65-key arrangement squeezes punctuation and arrow keys, and typists report a learning curve.
Multi-devicePraisedSwitching between three paired devices over Bluetooth is quick and reliable.
BacklightCriticisedThere is no backlight, which owners miss when typing in low light.
BuildMixedThe PU cover is liked, but the folding hinge and thin deck draw durability concerns.

From ProtoArc

Two-fold palm-sized pocket design for maximum portability
Integrated PU leather cover for protection and premium texture
Triple Bluetooth channels for multi-device pairing
Type-C rechargeable with up to 150+ days standby time
Auto-sleep function for effective power conservation
ProtoArc scissor key switch technology for stable key-press

Materials: PU leather cover
Fit: Folded: 5.74 in x 4.07 in x 0.71 in; expanded: 10.77 in x 0.34 in
Sizing: Compact, smaller layout designed for quick tasks with phones/tablets
Guarantee: 2-Year Limited Hardware Warranty
Returns: 30-Day Returns; review the Returns Policy before purchase
Shipping: Free shipping on eligible orders; U.S. orders arrive within 2–3 business days, some orders may take 7–12 business days
Packs: Bulk discount: 10% off for 5+ pcs, 15% off for 50+ pcs, automatically applied
In the box: 1x XK04 Foldable Compact Keyboard, 1x USB-C cable for recharging, 1x Collapsible Phone Holder, 1x User Guide