The Onyx Boox Tab X C has a footprint of 287.5 mm in height and 243 mm in width, with a notably slim 5.3 mm thickness that keeps its overall volume at 370.27 cm³. Despite its large format, the device weighs 625 g, which is a natural consequence of its sizable 13.3″ frame. It is not weather-sealed, so it offers no splash or water resistance.
The Onyx Boox Tab X C features a 13.3″ e-paper touchscreen with a resolution of 2400 x 3200 px and a pixel density of 300 ppi, producing finely detailed text and imagery across its large surface. The display is self-lit and includes an anti-reflection coating, making it comfortable to use in a range of lighting conditions. It does not feature branded damage-resistant glass.
The Onyx Boox Tab X C is equipped with an octa-core processor running at 8 x 2.8 GHz and 6GB of RAM, giving it a solid processing foundation for an e-reader. It offers 128GB of internal storage for documents, books, and applications, though it does not include an external memory slot for further expansion.
The Onyx Boox Tab X C supports Wi-Fi 4 (802.11n) and Wi-Fi 5 (802.11ac) for wireless networking, along with Bluetooth 5 for peripheral connections. It also includes a built-in browser for web access. The device does not feature a cellular module, NFC, DLNA certification, or an HDMI output.
The Onyx Boox Tab X C houses a 5500 mAh rechargeable battery that charges via USB Type-C, and it includes a battery level indicator to keep track of remaining charge. The battery is not removable, and the device supports neither fast charging nor wireless charging.
The Onyx Boox Tab X C includes stereo speakers with text-to-speech support, a built-in dictionary, and HDR mode, rounding out a fairly capable feature set for an e-reader. It is compatible with 26 file types and has an accelerometer for orientation sensing. Audio output is handled entirely through the built-in speakers, as the device lacks a 3.5 mm headphone jack. It does not include a front camera, GPS, compass, gyroscope, radio, or child lock.
The Onyx Boox Tab X C offers a broad set of software and privacy features, including on-device machine learning, offline voice recognition, voice commands, Live Text, and sharing intents. On the privacy side, it provides location privacy options, camera and microphone access controls, app tracking blocking, and clipboard warnings, though it does not block cross-site tracking and lacks Mail Privacy Protection. The interface supports dark mode, dynamic theming, theme customization, widgets, split-screen multitasking, picture-in-picture, full-page screenshots, and an extra dim mode, while focus modes are not available. It is a multi-user system with customizable notifications, notification permissions, and a media picker. Additional capabilities include device position tracking, slow-motion video recording, in-camera panorama creation, and the ability to play content while downloading. Wi-Fi password sharing, battery health check, app offloading, and Quick Start are not supported. The software is free and open source.
