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 USB decoding chip supports 24bit 96kHz Multiple sets of LDOs are used to avoid interference between different circuits, digital-to-analog separation of ground lines, and reduction of interference 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. Power supply mode: USB power supply Support Windows XP/VISTA, Windows 7/8/10; MAC OS; Plug and Play 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 Input: USB interface; Output interface: RCA (double lotus) Size: length 78mm x width 51mm x 21mm Colour: As Shown Material: ABS Package Contents: 3 x Audio Decoder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.