1: The PCB adopts a four layer immersion gold process design to good performance in passing large and small currents 2: SITIME active crystal oscillator 3: Adopting MCU optimization control scheme, the USB data chip is fully optimized, resulting in better signal integrity and less signal distortion Supported sampling rates:PCM:16/24/32 bit 44.1/48/88.2/96/176.4/192/352.8/384/768KHz DSD:64/128/256/512 SPDIF :44.1/48/88.2/96/176.4/192 KHZ MQA:44.1/48/88.2/96/176.4/192/352.8/384KHz Support system: 1:for WIN7,for WIN8,for WIN10, (Need to install driver we provide)Note: Please contact customer service about download or installation information before placing order. 2:for Linux, for OSX10.6+, for Android, for iOS use system built-in drivers Color: As Shown Material: PC Package Contents: 1 x Amplifier Module Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.