Xteink X3 3.7-Inch E-Ink Pocket Reader, 259 PPI Paper-Like Display, Gyroscope Page Turning, Physical Page Buttons, NFC and Wi-Fi (Developer Edition)

Product Introduction:
Model: X3;
Materials: ABS + electronic components;
Version: English (Developer Edition);
Colors: Starry Black / Mist Gray;
Dimensions: 97.6 × 63.7 × 5.1 mm;
Weight: 58g;
Display: 3.7-inch E-Ink screen, 259 PPI, 528×792 resolution, non-backlit, non-touch;
Storage: Includes a 16GB MicroSD card (pre-installed); supports expansion up to 256GB;
Supported Formats: Documents (EPUB/TXT), Images (JPG/BMP), Fonts (BIN);
System Languages: English, Chinese, Japanese, Turkish;
Battery: 650mAh; lasts 10–14 days on a single charge (based on 1–3 hours of daily reading);
Connectivity: 2.4GHz Wi-Fi + Bluetooth;
Charging Port: Magnetic Pogo Pin (includes a dedicated charging cable; not Type-C);
Physical Buttons: Power button + dual page-turning buttons;
Special Features: NFC (supports unencrypted access cards), gyroscope-based "shake-to-turn-page" function, magnetic attachment to smartphones, and customizable desktop displays (clock/photos/etc.);
System: Unlocked firmware (Developer Edition) — no ads, no pop-ups. Compatible exclusively with the official Xteink app; does not support third-party apps.

Product Highlights:
1. Ultra-slim and Pocket-Portable: Weighing only 58g and measuring 5.1mm in thickness—smaller than a credit card—it fits easily into any pocket. Perfect for reading on the go during commutes, business trips, or spare moments; comfortable to hold for long periods with one hand.
2. High-Definition, Paper-like 259 PPI Display: Features a 3.7-inch E-Ink screen with a pixel density of 259 PPI. It offers crisp, detailed visuals without glare or flickering, ensuring a comfortable reading experience that mimics real paper—even during extended reading sessions. 
3. Magnetic Secondary Display Design: Features a magnetic back and an adhesive metal ring, allowing it to attach directly to the back of your smartphone. Switch instantly from your phone screen to an E-ink display—perfect for eye-friendly reading whenever you need a break from your phone. It functions as both an e-reader and a secondary smartphone display.
4. Open Firmware (Developer Edition): Equipped with an operating system designed for developers, free from third-party restrictions, advertisements, or pop-ups. Customize your reading experience or flash custom firmware—ideal for tech enthusiasts and geeks who love to tinker.
5. Dual Page-Turning Options (Gyroscope + Physical Buttons): Supports page-turning via a built-in gyroscope (by shaking the device) or physical buttons. Enjoy comfortable, one-handed operation whether you’re standing, commuting, or lying down—far more convenient than devices relying solely on touchscreens.
6. NFC Access Card Functionality: Built-in NFC module allows you to clone unencrypted access cards. Leave your physical access cards at home and simply use the device to open doors—making your daily commute or office routine more convenient.
7. Long-Lasting Battery Life: Powered by a 650mAh battery, the ultra-low-power E-ink display offers 10 hours of continuous reading or 10–14 days of light, everyday use on a single charge—no need for frequent recharging.
8. 16GB Internal Storage + 256GB Expansion: Comes with a pre-installed 16GB MicroSD card, capable of storing thousands of e-books, comics, and photos. Supports expansion up to 256GB via TF card, letting you carry an extensive library with you wherever you go.
9. More Than Just an E-Reader: Offers versatile modes including reading, photo display, a desktop clock, and custom wallpapers. Use it as a desk clock, a digital photo frame, or attach it to your refrigerator as a memo board—the possibilities are endless.
10. Multi-Language Support: Supports English, Simplified Chinese, Traditional Chinese, Japanese, and Turkish, catering to users across different regions worldwide. 

Packing List:
X3 E-ink Reader ×1;
16GB MicroSD card (pre-installed in the card slot) ×1;
Magnetic Pogo Pin charging cable ×1;
Card reader ×1;
Matte screen protector ×1;
Adhesive metal magnetic ring ×2;
User manual ×1;