EDIT: Ok, besides the fact that I have over 45 ebook readers already, fuck it, I just ordered one of these. It's small, so just one more is fine, right?! :)

The Xteink X4 is a miniature e-reader from Xteink, a small hardware company based in Shenzhen, China. The company’s founder, Crusoe Hu, introduced Xteink to international readers in late 2025 at a price of $69.

The basic idea was simple: make an e-reader small and thin enough that people would actually carry it everywhere. Instead of competing directly with a Kindle as a primary home reader, the X4 was meant for short reading sessions during lunch breaks, appointments, bus rides, or other moments when people would normally reach for their phones.

The X4 has a 4.3-inch black-and-white E Ink screen with a resolution of about 220 pixels per inch.

It measures approximately 4.49 by 2.72 inches, is just under a quarter-inch thick, and weighs around 74 to 77 grams, depending on which company figure is used. That makes it noticeably smaller and lighter than a typical Kindle.

Its other major specifications include:

• ESP32 processor

• 650 mAh rechargeable battery

• USB-C charging

• Wi-Fi and Bluetooth

• 16 GB microSD card included

• Support for microSD cards up to 256 GB

• EPUB and TXT book support

• JPG and BMP image support

• Physical page-turn and navigation buttons