Outstanding Performance With Flagship DAC Arrangement HiBy has featured a flagship-grade design architecture as the core part of R6 Pro II. The player adopts a new flagship DAC duo featuring AK4191EQ and dual AK4499EX DAC chips. Class A/AB Dual Amplification Circuits HiBy R6 Pro II delivers an immensely clean and precise output with its professionally designed dual Amp circuits. It supports Class A and AB operating modes both of which are freely switchable. The Class A amp circuit is driven by Dual OPA1652 chips and 8 NXP bipolar transistors for zero crossover distortion and fast transient performance. Class AB mode has a longer playback time and lower-heat emissions as well. Ultra-Low Jitter NDK Femtosecond Precision Crystal Oscillators HiBy has equipped dual femtosecond precision crystal oscillators onboard the R6 Pro II. They deliver outstanding performance with ultra-low phase noise and jitter control. Open Android 12 OS with Systemwide High-Resolution Audio Performance The R6 Pro II comes loaded with open Android 12 OS. It supports native high-resolution audio signal decoding throughout the system, uses any application on Android. Independent Headphone Output amp; Line-Out Function HiBy R6 Pro II portable audio player features independent 3.5mm and 4.4mm headphone output and line-output ports. The device also provides coaxial, USB, and Bluetooth digital output support as well. Specification Model: HiBy R6 Pro Gen 2 OS: Android 12 SoC: Snapdragon 665 DAC: AK4191EQ + dual AK4499EX Audio format: DSD1024, PCM1536KHz/32 bit, MQA16X Output Ports: 3.5mm PO / 4.4mm BAL amp; 3.5mm LO / 4.4MM BAL.LO Output Ports (2): Type-C USB and Coaxial Digital Display size amp; type: IPS Panel, 5.9 #34;, and resolution 1080x2160 Storage: Internal 64GB + 4GB RAM Battery Capacity: 5000mAh/3.8V