Closed system, no applicationsThe Xteink X4 Pro is an upgraded compact portable e-ink reader designed for lightweight pocket reading. Featuring a 4.3-inch touch-sensitive e-paper screen and newly added adjustable warm & cool front light, it brings soft, glare-free paper-like reading experience to protect your eyes during long-time reading at day or night.Weighing merely 72 grams with ultra-slim form factor, this mini e-reader adopts built-in magnetic design, which can be firmly attached to the back of smartphones, easy to slip into pockets or bags for outdoor carry. It combines physical page-turn buttons and full touch operation for flexible control, satisfying different user operation habits.Powered by 1100mAh rechargeable battery, X4 Pro offers outstanding endurance for daily reading. It supports WiFi and Bluetooth connection, enabling convenient book, font and wallpaper sync via mobile application. TF card expansion is available to store a large library of e-books and comics.Beyond reading, it supports diversified DIY scenes, customizable screensavers, electronic name tag, calendar and more practical widgets. The clean operating system has no pop-up ads, letting you focus purely on reading. Ideal for novel lovers, comic fans, students and office workers who need a lightweight distraction-free reading device on the go.