📖 Xteink X4 Pro Black Pocket E-Reader

4.3" E-Ink · 219PPI · Magnetic Phone Attach · 72g · 1100mAh · XTOS Closed System · 16GB

✅ Compatible Product

• Smartphone Magnetic Attachment: Sticks to MagSafe-enabled iPhones (12–16 series) and magnetic phone cases ✅

• Non-MagSafe Phones: Use included 2× adhesive magnetic rings on any phone/phone case back ✅

• Computer File Transfer: Windows PC / macOS via USB cable (USB-C or Micro-USB depending on unit batch) ✅

• App Companion: Xteink Reader App (Android/iOS/Windows/macOS) for PDF reflow and library management ✅

• File Formats: Native EPUB, TXT, JPG, BMP; PDF reflow via Xteink Reader App ✅

❌ Not a tablet — no web browser, no app store, no Android app sideloading (closed XTOS)
❌ No Bluetooth audio — text-to-speech not supported; reading only via screen
📦 Package Contents

• 1 × Xteink X4 Pro E-Reader (Black)

• 1 × 16GB TF Card (pre-installed or loose, depending on batch)

• 1 × Accessory Pack (includes matte screen protector + application tools)

• 1 × Magnetic Charging Adapter (USB charging passthrough / magnetic connector)

• 2 × Adhesive Magnetic Rings (for non-MagSafe phones)

Note: USB charging cable not included.
🔍 Product Overview

The Xteink X4 Pro is an ultra-portable pocket e-reader built for commuters and travelers. At 72g and 5.95mm thin (111 × 69mm), it's card-sized and attaches magnetically to your phone back — no separate bag needed. The 4.3" black-and-white E-Ink screen at 219PPI delivers paper-like reading with zero blue-light flicker. A dual warm/cool front light lets you tune color temperature for day or night. Powered by XTOS, a closed low-power OS with no social apps or pop-ups, it boots straight to your library. 1100mAh lasts about a week of fragmented reading. 16GB TF card holds thousands of books. Transfer files via USB to PC or use the Xteink Reader App for PDF reflow. Physical page-turn keys + touchscreen + touch Home button give flexible control.

✨ Key Features

• 🧲 Magnetic Phone Back: Snaps onto iPhone 12–16 MagSafe or any phone with included adhesive rings — always with you.

• 📄 4.3" E-Ink 219PPI: Crisp monochrome text, front-light with adjustable warm/cool tones, eye-friendly for long sessions.

• 🔘 Dual Control: Touchscreen + physical page-turn buttons + touch Home key — read one-handed.

• 🔋 1100mAh ≈ 1 Week: XTOS power optimization stretches battery through days of commute reading.

• 📚 16GB Local Library: Thousands of EPUB/TXT titles offline; PDF reflow via companion app.

• 🚫 Distraction-Free: Closed XTOS — no notifications, no app store, pure reading focus.

• 🪶 72g Card-Thin: 5.95mm body fits any pocket, wallet slot, or phone case stack.

⚙️ Technical Specifications
💡 Usage Tips

• First setup: Apply matte screen protector from accessory pack before first use — reduces glare on E-ink.

• Phone pairing: Stick one adhesive ring on your phone case back; the X4 Pro snaps on and rides along all day.

• PDF reading: Send PDFs via USB, then use Xteink Reader App to reflow text — avoids tiny-font pinch-zoom.

• Night reading: Slide front light to warm tone at ～30–40% brightness — easiest on eyes in dark.

• Battery habit: Charge via magnetic adapter or USB when it dips below 20%; full charge takes ～1.5–2h.

• Library management: Drag-and-drop EPUB/TXT into root folder via USB; device auto-scans on next boot.

⚠️ Important Notes

• Closed system — cannot install Kindle App, Chrome, or any Android APK; sideloading blocked by design.

• No backlight color — screen is monochrome only (black/white); no color E-Ink.

• MagSafe ring placement — align adhesive ring center carefully; off-center magnet may slip off phone.

• PDF reflow is app-side — original PDF rendering on device is direct image; reflow needs Xteink Reader App preprocessing.

• TF card batch variance — some units ship with card pre-inserted, some loose in bag; insert before first boot if loose.

• Not waterproof — no IP rating; keep away from rain, sweat, and humid pockets.