XDuoo Link2 Bal Portable USB DAC & Balanced Headphone Amplifier 3.5mm Headphone Out 4.4mm Balanced Output DAC CS43131 Overview: Link2 Bal is an USB DAC & balanced headphone amplifier specially designed for mobile phones. It uses high PSRR LDO to optimize the design of the mobile phone power supply to further reduce the power noise. The DAC uses dual CS43131 chips, better decoding performance, with extremely low noise and higher resolution, which greatly improves the sound quality. This product is small in size, no battery, plug and play, can be connected to IOS, Android mobile phones/tablets, also can be connected to  computers, support up to PCM32Bit/384kHz, DSD256 songs, greatly improving the sound quality of your phone or PC. Features: With multi-color LED indicator, it can display the workingstatus of the product in real time. USB in works in asynchronous transmission mode, supports up to PCM32Bit/384 kHz, DSD256(DOP or NATIVE mode). Can be work with Windows, IOS or Android mobile phone. The DAC uses dual CS43131 chips, one for each channel, with better decoding performance, extremely low noise and higher resolution, which greatly improves the sound quality. Built-in filter circuit and high-efficiency power conversion circuit, using high PSRR LDO optimized power supply design, separate power supply for the DAC, headphone amplifier, and USB chip, further reducing the output distortion and noise. One output power switches can be adjust to adapt to earphones with different impedances. Specifications: 3.5mm Output Output Power: 200mw@32ohm, 107mW@75ohm, 68mW@150ohm, 34mW@300ohm THD+N: 0.001%@1kHz S/N: 124dB Crosstalk: ≥79dB 4.4mm Output Output Power: 270mW@32ohm, 163mW@75ohm, 105mW@150ohm, 53mW@300ohm THD+N: 0.007%@1kHz S/N: 128dB Crosstalk: ≥122dB Frequency Response: 20Hz~20kHz(±0.5dB) Color: Black, Green Item Size: 6.3*2.3*1.3cm/2.48*0.90*0.51in Item Weight: 29g/1.02oz Package Size: 14.5*8*3cm/5.70*3.15*1.18in Package Weight: 125g/4.41oz Package List: 1 * Headphone Amplifier 2 * Type-c Cable 1 * USB C B A Adapter 1 * User Manual (English/Chinese)