Designed by Carbon Computers, the CyberT. is a BlackBerry-style handheld Linux computer equipped with a 4-inch panel built around the Raspberry Pi CM4. It features a custom QMK-powered QWERTY keyboard, a BlackBerry-style touchpad, HDMI output, microSD card slot, stereo speakers, and an onboard battery management system (BMS), packed into a compact form factor.
Compared to Clockwork’s uConsole, which features swappable CM3/CM4 SoMs, a 5-inch display, and optional 4G LTE, the CyberT. focuses on cybersecurity and portable development. While many Raspberry Pi CM4-based handheld devices like the RetroLite CM4 and ReBoi target retro gaming with joysticks or Game Boy-style enclosures, the CyberT., takes a cyberdeck-style approach and runs Kali Linux, or other Linux distributions like Raspberry Pi OS.
CyberT. Beta Specifications:
- SoM – Raspberry Pi Compute Module 4 (CM4)
- Storage – MicroSD card slot for OS and data storage
- Display
- 4-inch 720×720 RGB TFT display (ST7701S controller, TTL RGB interface – not yet supported)
- HDMI output (default for Beta version)
- Camera – Compatible with standard Raspberry Pi camera modules
- Audio
- Integrated stereo speakers
- 3.5mm headphone jack
- Built-in microphone
- Connectivity – Optional, depends on CM4 variant (Wi-Fi, Bluetooth)
- USB – USB-C port for charging
- User inputs
- Backlit QWERTY keyboard (QMK-compatible, fully programmable)
- BlackBerry-style touch sensor (acts as touchpad/cursor)
- Power, Volume, and Reset buttons
- Misc
- Battery level indicator LEDs
- USB DRP switch (device works as a USB device when engaged)
- Power Supply
- 5V CM4 operating voltage
- Battery operated with onboard BMS
- USB-C charging port
- Dimension – TBD
- Form factor – Compact handheld 3D printed cyberdeck-style enclosure
One big issue with this device is that the built-in RGB display is not working yet. The team ran into problems writing a stable driver for the ST7701S controller used in the 4″ 720×720 TTL display from Adafruit. As a result, the CyberT. Beta relies on an HDMI output for now. They’re still working on getting the original display to work in future updates. At the time of writing, the device is in beta, and the final production version will look completely different, as we can see from the renders. In the meantime, you can check out Auspicious Machine, a similar handheld Linux PC with a built-in QWERTY keyboard and a 3.5-inch display.
In terms of software, this handheld Linux computer can run various Linux distributions, including Raspberry Pi OS, Kali Linux, and other ARM-based operating systems. Meaning you can also use this as a portable hacking device. More information about the product can be found on the Carbon Computers’s announcement. You can also join their Discord community for the latest updates.
Beta samples of the CyberT. handheld device can be purchased for $88.97 on the Tindie store. Besides the 4-inch display not working yet due to WiP drivers, this handheld device currently only works with the Raspberry Pi CM4, and the CM5 is not compatible, since the beta units do not output enough power.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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