1. Using SA9023A ES9028K2M 2. The main circuit of electrolytic capacitor signal adopts electrolytic capacitor , which guarantees strong and continuous . 3. PCB uses 1.6mm thick double panel, 2.0A thick copper, tin spraying process to good passing performance of large and small currents. First-class PCB quality. 4. Supporting maximum 24-bit 96K sampling rate, supporting: 33K, 44.1K, 48K, 88.2K, 96K sampling rate. Due to the negative voltage generated by the charge pump integrated in the chip, ES9028 can directly output 2Vrms with reference ground wire under single power supply, eliminating the coupling capacitance of isolation. Moreover, the output amplitude can be set to less than 2Vrms level by resistance according to actual needs. The noise of switching machine can also be completely suppressed. The use of high- is not only to safety and quality, long service life, but also to that the actual performance can achieve the design goals. Pursuing first-class quality is our consistent aim. Colour: black Material: aluminum alloy Size: 91 x 73 x 31mm Package Contents: 1 x ES9028K2M+SA9023 enthusiast audio DAC sound card Only the above package content, other products are not included. Note: Light 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.