The Xteink S4 is the latest device from the upstart Chinese tech company, and it could be a game-changer in the non-Kindle e-reader market.
The Xteink S4 Might Be the Pocket E-Reader of My Dreams
The Xteink S4 is the latest device from the upstart Chinese tech company, and it could be a game-changer in the non-Kindle e-reader market.