The ES9038Q2M and JRC5532 are used, and the USB uses a customized security decoding chip. The resistance is made of five-ring metal resistor, and the main circuit is made of five-ring metal film resistor with accuracy of ±1%, which ensures the good signal-to-noise ratio of the whole machine. The coupling capacitor adopts the chip capacitor, the capacity is 3900UF/16V, to the strong and continuous . The PCB adopts 1.6mm thick double-sided plate, 2.0 Oz copper thickness, and the whole process of tin spraying to the good passing performance of large and small currents. Optical fiber input support up to 96KHZ, USB support 48K(PC comes with a driver does not need to install a driver). Specifications: Power supply voltage: DC12V 2A (5.5*2.1 interface) PCB size: 144x83MM Colour:As shown Material:PCB Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * Decoder 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.