Precursor
Open Hardware, RISC-V System-on-Chip (SoC) Development Kit
Screenshots

Hunter's comment
Precursor is an open hardware development platform for secure, mobile computation and communication. This pocket-sized device accommodates a built-in display, a physical keyboard, and an internal battery while remaining smaller and lighter than the average smartphone. Precursor was built for use on the road, but it compromises nothing as a development platform.
Link
https://www.crowdsupply.com/sutajio-kosagi/precursor

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