Xteink launched the X4 Pro, a tiny e-reader with a 4.26-inch E Ink screen, touchscreen interface, and built-in adjustable front light. The device weighs 72 grams, is 5.95 mm thin, and measures about the same size as the earlier X4 model [1, 2, 3].
The X4 Pro includes 16GB of internal storage, expandable with microSD cards up to 256GB, and is powered by a 1100mAh battery [3]. Instead of a USB-C port, it uses a magnetic pogo-pin connection for charging and data, with an adapter included in the box [2, 3]. The device also has magnets to attach to compatible smartphones, though the magnetic hold may be weak during pocket carry [1, 2, 3].
It supports DRM-free eBooks in formats such as EPUB and MOBI but cannot handle Kindle or Libby DRM-protected content [4, 3]. Users can convert EPUB files to Xteink's proprietary XTC format to preserve layout at the cost of larger file sizes [4].
The X4 Pro runs stock software considered somewhat clunky and limited, but third-party firmware like CrossPoint Reader is expected to improve usability [2, 4]. The e-reader retails for about $99, making it more expensive than prior Xteink models (X3 at $79, X4 at $69) but close to the $110 starting price of a basic Kindle [2, 3].
Reviews from July 21 praised the X4 Pro’s improvements over earlier models and its portability. TechCrunch called it a "swift improvement" with the touchscreen and front light enhancing the user experience [1]. The Verge noted, "The $99 X4 Pro costs almost as much as a Kindle, but it’s a tempting alternative if you prioritize portability," while also pointing out ongoing software frustrations [2]. Engadget detailed the device's specs and practical uses, emphasizing its ultra-portability [3].
