Powerhouse DAP PLAYER: Dual ESS9219C DACs deliver pristine sound with +121dB dynamic range and -114dB THD+N distortion, while FPGA-driven native DSD256 decoding ensures bit-perfect accuracy - all via advanced analog gain control that silences noise at any volume level As the ultimate mp3 player with Bluetooth, the AP80 PRO-X delivers MQA final 8X unfolding and studio-grade lossless audio. Its bidirectional Bluetooth 4.2 enables dual-mode versatility - stream wirelessly as a Bluetooth audio source or transform any smartphone into a HiFi system using the built-in Bluetooth DAC amplifier with CSR aptX support. This compact powerhouse operates flawlessly as both a high-fidelity dedicated mp3 player and wireless audio enhancer. This versatile digital audio player transcends expectations with multi-functional capabilities: track workouts as a step counter, enjoy e-books, and experience premium sound either standalone or paired with DAC amplifiers. As a robust digital audio player/DAC combo, it elevates any setup - boost phone/PC audio quality or transform into a reference-grade DAP. Universally compatible with macOS, iPadOS, Windows systems and beyond. Engineered as a precision hi res audio player, its CNC-milled aluminum unibody features cutting-edge X-architecture with diamond-faceted surfaces. Housing a Japanese ALPS volume wheel and dual jacks for full-sized headphones, this compact hi res powerhouse delivers flagship performance without bulk Reinventing the hi res audio player standard, it delivers 40-day standby with 8-11hr playback longevity. As the dual-wireless/hi-res certified hi res powerhouse, every track transmits studio-grade clarity while portable endurance conquers daily demands HIDIZS AP80 Pro-X Hi-Res DAP Dual ESS9219C DAC 0.0015% THD+N @32Ω DSD256 Native Decoding MQA Full Decoder 30hr FLAC Playback Hi-Res Audio Certified