Xteink X4 Pro 4.3-Inch E-Ink Pocket E-Reader, Magnetic Phone Attachment (Space Black/Developer Edition)

Product Introduction:
Model: X4 Pro
Material: ABS + electronic components
Version: English (Developer Edition)
Colors: Space Black / Mist Gray
Dimensions: 111 × 69 × 5.95 mm
Weight: 72g
Display: 4.3-inch E-Ink screen, 220 PPI, dual-tone front light (adjustable brightness and color temperature), single-point touch gesture support
Storage: Includes a 16GB MicroSD card (pre-installed); expandable up to 256GB
Supported Formats: Documents (EPUB, TXT, MOBI, PDF), Images (JPG, BMP, PNG), Fonts (BIN)
System Languages: English, Chinese, Japanese, Turkish
Battery: 1100mAh; lasts approximately 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 Type-C adapter; does not support direct Type-C cable connection)
Physical Buttons: Power button, Home button, and split-style page-turn buttons
Interaction: Dual-mode control via physical buttons and single-point touch gestures
Special Features: Dual-tone front light, strong magnetic attachment (can be attached to the back of a smartphone), multiple file transfer methods (via App, TF card, QR code scanning, or web browser), clock display, and customizable home screen
System: Unlocked firmware (Developer Edition) — no ads, no pop-ups; supports installation of third-party reading apps and custom fonts

Product Highlights:
1. Ultra-slim and pocket-portable: Weighs only 72g and measures 5.95mm in thickness Slim and lightweight—thinner and lighter than a smartphone—it fits easily into your pocket. Perfect for reading during commutes, business trips, or any spare moment; it’s comfortable to hold for long periods with just one hand.
2. 220 PPI High-Definition Paper-like Display: Features a 4.3-inch E-Ink screen with a pixel density of 220 PPI. The display is crisp and detailed, glare-free, and flicker-free. It’s gentle on the eyes during extended reading sessions, replicating the experience of a physical book, and remains clearly readable even under direct sunlight.
3. Adjustable Warm/Cool Front Light: Equipped with a built-in front light featuring adjustable brightness and color temperature. Use the warm light for eye comfort during the day, and the cool light for clarity at night—enabling comfortable reading anytime, anywhere, whether you’re tucked into bed or in a dimly lit environment.
4. Magnetic Secondary Display Design: With a strong magnetic back and an included adhesive metal ring, it attaches directly to the back of your smartphone. Switch instantly from your phone screen to the E-Ink display—a perfect way to give your eyes a break whenever you’re tired of your phone’s main screen. It functions as both an e-reader and a secondary display for your smartphone.
5. Open Firmware (Developer Edition): Designed for developers, this version comes with an unrestricted operating system—no third-party limitations, no ads, and no pop-ups. Users have the freedom to install various reading apps, customize fonts, or even flash third-party firmware—an ideal choice for tech enthusiasts and geeks who love to tinker.
6. Dual-Mode Interaction (Physical Buttons + Touchscreen): Classic physical page-turn buttons evoke the tactile feel of a real book, while the touchscreen supports intuitive gesture controls. These dual interaction methods cater to diverse reading habits, ensuring comfortable use whether you’re standing, commuting, or lying down.
7. Long-Lasting Battery Life: Powered by an 1100mAh high-capacity battery, the energy-efficient E-Ink display allows for 10–14 days of light, daily use on a single charge. There’s no need for frequent recharging, making it a reliable companion for business trips and travel. 8. Convenient file transfer options: Supports four methods for transferring books—via the app, TF card, scanning a QR code with your phone, or through a web browser on your computer. It is compatible with mainstream file formats such as EPUB, PDF, TXT, and MOBI, allowing you to easily access your existing library without the need for a wired connection every time you add new content.

Package Contents:
X4 Pro E-ink Reader ×1;
16GB MicroSD card (pre-installed in the card slot) ×1;
Type-C to Pogo Pin magnetic charging adapter ×1;
Matte screen protector (includes application tools) ×1;
Adhesive metal magnetic ring ×2;
User manual ×1;