Features: Stereo Amplifier with Built-in DAC Integrated Amplifier (45 watts @8 ohms, 65 watts @4 ohms) ESS Sabre32 ES9018K2M Reference Chip Ultra-low Noise Digital Audio File Compability (384kHz PCM, DSD256) Bluetooth 5.0 (aptX / AAC) Support Dedicated High-performance, Low-noise MM Phono Stage Headphone AMP With High-speed Output Signal Transition USB Upgrade Support Large Tractile Controls with LED Level Indicators Sampling Frequencies: Optical / Coaxial: 44.1kHz-192kHz; PC USB:44.1kHz-384kHz (PCM) / DSD64, DSD128, DSD256 DAC: ESS Sabre32 ES9018K2M Resolution: 32-bit Max. Sampling Frequency: Optical/Coaxial: 192kHz; USB: PCM 384kHz / 11.2896MHz (DSD256) ***Serial numbers are recorded, and video before and during shipping.***