Product description: 1. The DAC part adopts ES9018K2M decoding of American ESS company. The decoding chip supports 32bit/384kHz, and DSD, with excellent dynamic DNR: 127dB; low distortion THD+N 120dB 2. USB decoding chip supports 24bit 96kHz 3. Multiple sets of LDOs are used to avoid interference between different circuits, digital-to-analog separation of ground lines, and reduction of interference 4. The op amp part is powered by positive and negative voltage, and 3 op amps are used. Two (TI NE5532) are responsible for I/V conversion and LPF. One (TI TL072) is responsible for differential single-ended, the bottom of the op amp. The installation of Taiwan Zhengling Seiko's socket not only ensures good contact, but also facilitates the replacement of different styles of op amps by fans. 5. Power supply mode: USB power supply 6. Support Windows XP/VISTA, Windows 7/8/10; MAC OS; Plug and Play 7. All-aluminum alloy ribbed process chassis, the appearance of throwing away from the same price machine a grade, gold-plated RCA terminal output. RCA line output on the board, can be connected to active speakers or amplifiers, can not directly connect passive speakers 8. Input: USB interface; Output interface: RCA (double lotus) 9. Size: length 78mmx width 51mmx21mm ( without protruding parts ) Note: The decoding chip can support 32bit/384khz. However, Pc-usb supports up to 24bit/96kHz, but Pc-usb does not support such a large input.