Based on the project of this repository:

Andrew Beer/Duncan Edwards/Rafael Molina

Plays TZX, TSX, TAP, CDT, CAS, P, O files from microSD. For ZX Spectrum, ZX80, ZX81, BBC Micro, Amstrad CPC and MSX.

Thanks to Rafael Molina for the firmware. This version has ATMEGA32u4, that allows easy upgrade with the USB cable. No need to open and buy special cables.

MicroSD card not included. Power cable included (USB A to MINI B) only for Spain.

English guide here thanks to @Kounch