Xteink X3 Delivers Ultra-Portable 3.7-Inch E-Ink Reading Experience

Xteink released the X3, a credit card-sized e-ink reader measuring 3.7 inches that emphasizes extreme portability for on-the-go use. The device weighs 58 grams, incorporates a magnetic back for attaching to smartphones and delivers a 250ppi display sharper than its predecessor. Priced at $79, it supports EPUB and TXT files transferred through microSD cards or a wireless mobile app while offering up to two weeks of battery life from its 650mAh cell.

The X3 measures a millimeter thinner, a few millimeters narrower and over half an inch shorter than the X4 model. Its refined button layout places single controls on each side for scrolling and page turning with additional navigation buttons below the screen. A built-in gyroscope adds shake-to-turn functionality that enhances the reading experience during brief moments such as waiting in lines or sitting in a car.

Software updates include contextual onscreen labels above buttons on the homescreen and improved line spacing options. The reader lacks a front light, touchscreen and audio support, requiring external illumination for nighttime use and limiting it to sideloaded content without bookstore integration. Early testing indicates the compact form factor makes it highly pocketable though the small screen often necessitates reading glasses for comfortable small-font viewing.

Charging occurs exclusively through a magnetic pogo-pin connector on the rear rather than a standard USB-C port. The proprietary cable raises concerns about loss or replacement since the long battery life reduces frequent charging needs. Replacement cables are scheduled to become available later, according to product details from the manufacturer.

An ESP32 processor powers the unit that ships with a 16GB microSD card expandable to 512GB. It includes Wi-Fi and Bluetooth connectivity yet does not support audiobooks or advanced note-taking features found on larger tablets. The X3 also functions as a USB device for installing alternative firmware such as CrossPoint Reader which now offers official support.

The reader targets users seeking a secondary distraction-free screen that disappears into any pocket while remaining comfortable to hold. Its design follows the X4 by prioritizing minimalism over polished interfaces common in devices from larger competitors. Additional accessories including magnetic reading lights and cases are available on the manufacturer’s website.