Product description: 1. The DAC part adopts the ES9018K2M decoder of the American ESS company. The decoding chip supports 32bit/384kHz, DSD, with excellent dynamic DNR: 127dB; low distortion THD+N 120dB 2. The USB decoding chip supports 24bit 96kHz 3. Use multiple groups of LDOs to avoid mutual interference. Different circuits and ground wire numbers Mode separation to reduce interference 4. The operational amplifier part is powered by positive and negative voltages, and three operational amplifiers are used. Two (TI NE5532) are responsible for I/V conversion and LPF. One of them (TI TL072) is responsible for differential single-ended, the lowest operational amplifier. Taiwan Zhengling Seiko's socket installation not only ensures good contact, but also facilitates enthusiasts to replace different styles of op amps. 5. Power supply mode: USB power supply 6. Supports Windows XP/VISTA, Windows 7/8/10; Apple system; plug and play 7. All-aluminum alloy ribbed process chassis, the appearance is a level above the same price machine, gold-plated RCA terminal output . There is RCA line output on the board, which can be connected to active speakers or power amplifiers, but cannot be directly connected to passive speakers. 8. Input: USB interface; Output interface: RCA (double lotus) 9. Dimensions: length 78mmx width 51mmx21mm (no protruding part) 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.