eService Digital
PocketInk 3.7
The palm-size E-Ink companion that does far more than read.
1 | Ultra-portable design, true paper feel
Smaller than a deck of cards and just 9 mm thin, PocketInk 3.7 tucks beside your phone yet unfolds entire novels on its 3.7-inch Carta-class ink panel. At < 60 g you’ll forget it’s in your pocket—until the next queue, commute, or campsite break begs for a chapter.
2 | Read without limits
Capability |
Why it matters |
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EPUB & TXT, full-unicode |
Drop books straight on—no conversion dances. |
Custom type engine |
Choose font family, point size, spacing, margins; rotate to any orientation. |
Smart navigation |
0–100 % progress jump, chapter picker, auto-scroll, landscape split view. |
Silent “10 M-cycle” page keys |
Zero click for midnight binge-reads or library stealth. |
Boss Key |
One tap hides pages behind a clock—instant discretion at the office. |
Your place in every book is stored independently, so hopping among manuals, manga and epics feels seamless.
3 | Tri-edition power choices
Edition |
Back-light |
Battery |
Runtime (typ.) |
---|---|---|---|
Lite |
— |
1 200 mAh |
up to 15 days reading / clock standby |
Glow |
Adjustable white |
1 500 mAh |
up to 12 days mixed use |
Enduro Glow+ |
Adjustable white |
2 500 mAh (adds 2 mm thickness) |
up to 28 days pure reading |
All models charge via USB-C and top off in ≈ 90 min. Glow & Glow+ let you dial warmth from white-on-black “bed-mode” to crisp daylight.
4 | More than an e-reader—your
everyday info slate
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Offline clock & calendar – dedicated RTC keeps perfect time, even unplugged for weeks.
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Weather Hub – county-level forecast (today + 48 h) with temp/humidity pulled via Wi-Fi; doubles as a bedside display.
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Tomato Timer – configurable Pomodoro cycles with gentle alert vibration or chime.
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Multi-alarm system – up to five schedules; choose work-day repeat or once-off.
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Learning Suite – flash-card vocab & poetry drills you can upload in CSV.
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Image Frame – cycle 8-bit BMP illustrations or manga strips; OTA soon to add PNG/WEBP.
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Music Pocket – Bluetooth 5.0 audio for MP3/WAV/AAC/low-bit FLAC; read and listen simultaneously.
5 | Always evolving:
OTA firmware
PocketInk runs on an ESP-Series MCU with 16 MB flash. Connect to Wi-Fi, tap System → Update, and new features—UTF-16/32 text, new image formats, UI skins—arrive without cables or computers.
6 | Precise craftsmanship
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One-piece ESUN advanced polymer shell: hand-polished, matte-white, never yellows.
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Reinforced mid-frame protects the delicate ink glass; every unit endures 48 h burn-in.
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Tactile micro-dimple back resists slips yet feels silky in the hand.
7 | Tech sheet
Item |
Spec |
---|---|
Display |
3.7″ E-Ink, 800 × 480 (255 ppi), 16-level gray |
Lighting |
None (Lite) • Adj. front-light (Glow, Glow+) |
CPU / RAM |
ESP32 dual-core @ 240 MHz • 8 MB PSRAM |
Storage |
16 GB on-board (≈ 12 GB user), USB-C OTG thumb-drive support |
Connectivity |
2.4 GHz Wi-Fi, Bluetooth 5.0 (A2DP) |
Sensors |
High-precision temp ±0.3 °C & humidity ±2 % RH |
Audio |
BLE ear-/head-phone output, system beeper |
Buttons |
Page ↑, Page ↓, Home/Boss, Power; 10 million-cycle silent tact switches |
Battery |
1 200 / 1 500 / 2 500 mAh Li-ion (USB-C 5 V-1 A) |
Dimensions |
94 × 68 × 9 mm (Lite/Glow) • 94 × 68 × 11 mm (Glow+) |
Weight |
58 g / 59 g / 63 g |
Materials |
ESUN polymer shell • Gorilla-class front glass |
Certifications |
CE • RoHS • FCC |
8 | In the eService Digital box
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PocketInk 3.7 reader (edition of choice)
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Braided USB-C charge & OTG cable
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Clip-on lanyard strap
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Quick-start leaflet & QR for full manual
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eService Care 12-month warranty + 50 % discount voucher for replacement battery (year 3)
9 | Who will love PocketInk?
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Students & commuters – slip lecture PDFs, flash-cards, and novels into any jeans pocket.
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Field techs & anglers – weather + tide charts in daylight-readable ink, 28-day battery.
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Focus hackers – silent buttons, Pomodoro timer, boss-key clock keep you deep-work ready.
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Minimalist desk junkies – perpetual calendar and e-paper photo frame in one elegant slab.
10 | The eService Digital advantage
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Advance-swap support – if your reader falters in year 1, we ship a replacement first.
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Firmware roadmap – UTF-16/32, PNG art mode, and Goodreads sync already on the 2026 schedule.
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Community resources – open template packs, custom fonts, and scripting examples in our GitLab.
PocketInk 3.7 — read, learn, track, and chill anywhere.
Slip it beside your phone and carry a library, planner, and weather station—always on, never glaring—in the tiniest e-paper form we’ve ever built.
Available now in Cloud White (Lite/Glow) and Graphite Grey (Glow+). Add to cart and join the pocket-reading revolution.