Features: Original STM32H750, electrolytic capacitor adopts imported famous brand, and other capacitors adopt Bay famous brand, with quality. Full-wave bridge rectifier circuit is adopted to ensure strong and continuous power support. High-precision chip resistor is selected to ensure good SNR of the whole machine. 1.6mmThick double-sided printed circuit board plate, 2.0oz copper thickness, tin-spraying process, to ensure good passing performance of large and small current. With the SD-card firmware update function, put the firmware APP.h released by us in the SD-card directory, and start the update. The update-time is only 1-2 seconds. It does not affect whether the firmware is delete or not. Only one level subdirectory is supported, and only 32GB memory card is supported (the memory card must be CLASS6 and above, and must be HC-card). Specifications: Main Material: Printed Circuit Board Size: Approx. 144x53.5mm/5.67x2.11inch Display Screen: 2.8-inch TFT Color LCD Screen Voltages: DC12V Output-mode: I2S Supported Formats: WAVE: 44K1-192K 16Bit-32Bit FLAC: 44K1-192K 16Bit-24Bit APE: 44K1 16Bit DSD: ISO DSF DFF 64-128 Package Includes: 1x Decoding Board note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different display resolution.