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Overview: The X900 expansion board is suitable for Raspberry Pi 3 Model B/ 2B / B+ DAC All-function with ES9023 chip Operating System: All Raspberry Pi operating systems Features: - Full-HD audio – up to 24-bit/192kHz playback - Built in Sabre premier stereo DAC (ESS Technology ES9023) - ES9023 delivers jitter-free studio quality audio with 112dB DNR - Ultra-low-jitter 50MHz clock generator - TI's LP5907 Ultralow-Noise voltage regulator for optimal audio performance Built in IR receiver (Vishay TSOP34838) - Available with RCA and 3.5mm phone jack output connectors - Powered by Raspberry Pi£¬ no external power requirements - Conforms to the Raspberry Pi hardware-attached-on-top (HAT) specification - Access to GPIO pins on HAT [How To Use]