The PCB is designed with double-layer gold deposition process to good passing performance of large and small current. Dual ES9038Q2M chips, one for left channel and one for right channel. Dual operational amplifier is adopted, and the operational amplifier is powered by positive and negative power supply. The MCLK of ES9038Q2M is an clock of 100M, so you only need to enter DATA BCK LRCK GND. Different batches, the appearance of the electronic components on the board may be different from the picture, but the function is the same and does not affect use 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 Signal input: I2S Output: 3.5MM headphone holder, 2.5MM balanced headphone Material: PCB+electronic components colour: black Package Contents: 1 x Dual ES9038Q2M decoding board 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.