Paper-like reading. A little help from AI.
Two pocket-sized readers, thoughtfully finished in aluminum and glass.
From your everyday bag to a seat by the window. Bring a few more chapters along.
Crisp text. A paper-like screen. Choose the compact 3.97-inch E-INK 4, or enjoy more reading space on the sharper 4.7-inch E-INK 4 Plus.
Both models feature an E-Ink touchscreen and physical controls.
Set the adjustable front light to suit your space. The E-INK 4 Plus keeps your reading in view when the room gets darker.
E-INK 4 has no front light and needs ambient lighting.
A smooth glass back meets a sturdy aluminum alloy frame. Silver finishes and tactile orange buttons make a quiet statement, wherever you set it down.
Tap the screen to navigate, or press a physical button to turn the page. Two ways to interact, always close at hand.
Ask a question by voice, explore a new topic, or create an AI image. A few more possibilities, right on your reader.
Use voice-based Q&A to explore general knowledge and everyday questions.
Explore AI image generation, with images displayed in the screen’s natural grayscale.
Access AI translation on E-INK 4 Plus—a useful companion for learning and travel.
Keep the time, date, weather, and schedule reminders in view. On your desk, Metalio becomes a simple companion for your day.
Explore open-source code and compatible third-party firmware to personalize your experience. A flexible platform for curious readers, developers, and makers.
Firmware compatibility and available features vary by build.
Go lighter. Or make a little more room.
A smaller, lighter reader for everyday carry. A 3.97-inch screen, at just 70 g.
Choose E-INK 4 ↗A larger 4.7-inch display, sharper text, and adjustable front lighting for low-light reading.
Choose E-INK 4 Plus ↗See the product page for current pricing, availability, and dispatch information.
| At a glance | E-INK 4 | E-INK 4 Plus |
|---|---|---|
| Main Controller | ESP32-S3 | ESP32-S31-NRV16 |
| E-Ink touchscreen | 3.97″ · 235 PPI | 4.7″ · 297 PPI |
| Resolution | 800 × 480 | 684 × 1216 |
| Front light | None | Adjustable brightness |
| Weight / thickness | 70 g / 6.8 mm | 100 g / 7.8 mm |
| Battery capacity | 1000 mAh | 2000 mAh |
| Voice Q&A / AI images | Yes | Yes |
| Storage card | 16 GB included | 16 GB included |
Both models: Wi-Fi connectivity; physical buttons and touchscreen controls; aluminum alloy frame and glass back; built-in speaker and microphone; ebook reading and audiobook playback; weather, clock, and schedule features; open-source customization; 16 MB internal flash and an included 16 GB TF card, with TF card expansion up to 256 GB.
E-INK 4 dimensions: 107 × 63.7 × 6.8 mm. E-INK 4 Plus dimensions: 122 × 71 × 7.8 mm. Plus display: 16-level grayscale. Battery capacities are listed for comparison and do not imply a fixed runtime.
Choose E-INK 4 if your priority is the smaller, lighter device and you read with ambient light. Choose E-INK 4 Plus for a larger, higher-density display, adjustable front lighting, and AI translation.
Both readers support compatible third-party firmware and customization. Check your exact model and the firmware’s instructions before installing; features can differ from the original system.
Choose your size. Bring your reading along.
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Preloaded card and games was great and the price was right!!!
After about 5 years my old mini plus gained enough issues that I decided to replace it. I definitely feel like I got my money’s worth, to the extent that I bought exactly the same one to replace the old model!
Package arrived in perfect condition, and worked perfectly. 10/10, will buy from again!
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