Feature: 1. Advanced USB Chip: The USB receiving chip, XMOS's XU316, operates in asynchronous transmission mode, supporting up to PCM 32 Bit/768 kHz, MQA, and DSD512. It supports decoding USB audio from iOS, and Android phones, or tablets. 2. Rich Interfaces: A rich array of input and output interfaces accommodates a wide range of usage scenarios. Coaxial and optical inputs support up to PCM 24 Bit/192 kHz and DSD64 (DOP). USB supports up to PCM 32Bit/768kHz, MQA and DSD512. The BT chip supports BT 5.1, along with APTX, APTX_LL, APTX HD, and LDAC formats. 3. Premium DAC Chips: The DAC chip, featuring two ESS ES9039Q2M, offers superior decoding performance, extremely low noise, and higher resolution, significantly enhancing audio quality. 4. Micro Tubes for Audio: Two micro tubes are utilized to amplify the audio, delivering a sweet and delicate sound that remains pleasant even after extended listening periods. 5. Powerful Output Circuit: The output BUF circuit employs a rail-to-rail, low distortion, high current chip, ensuring it can drive most IEMs and headphones on the market with ease. 6. Low-Noise Oscillators: Equipped with dual active low-phase noise crystal oscillators, and FPGA-based data shaping processing, it achieves a unified clock and minimizes jitter. 7. Adaptable Sound Enhancement: External Turbo and Bass features cater to a variety of headphones, allowing for personalized sound customization. 8. Flexible Power Options: With an external power input and a power selector, it can transition to desktop mode with a switch, offering a more powerful and adaptable listening experience. Specification: DAC Chip: ESS ES9038Q2M*2 USB Chip: XMOS XU316 USB Support Format: PCM 16-32Bit/44.1k-768kHz, DSD64-512, MQA 1-8X BT Chip: QCC5125, BT 5.1 BT Format: SBC/AAC/APTX/APTX_LL/APTX_HD/LDAC Unbalanced Output Parameters: Output Power: 320@750mW (THD+N100dB BAL-LO Parameters: Output level: 4.0V THD+N: 0.00065% SNR: >124dB Crosstalk: >100dB Additional Specifications: Applicable OS: Compatibe with Windows, Linux, Mac OS, iOS, Android system Protection Circuits: Overheating/Overload/DC protection Battery: 3.7V/6000mAh Battery Life: USB IN, SPDIF IN about 4H, AUX IN about 4.5H Charging Time: about 3.5 hours (fast charging), 10 hours (slow charging) Color: Green Item Size: 16.8*7.8*2.3cm/6.61*3.07*0.90in Item Weight: 396g/13.96oz Package Size: 25*16*5cm/9.84*6.30*1.96in Package Weight: 933g/32.90oz Package List: 1 * XD05T Tube Amplifier1 * Type-C Cable1 * Type-C to Type-C Cable1 * USB A to Type-C Cable1 * 6.35mm to 3.5mm Headphone Adapter1 * USB A to Type-C Adapter1 * Nameplate1 * Bag of Silicone Foot Pad1 * User Manual