Adopt patch CS8412+NE5534 The electrolytic capacitor signal main circuit, the capacitor adopts NOVER special electrolytic capacitor capacity 2x4700UF, full-wave bridge rectifier circuit, to strong continuous . Five-ring metal resistance is used for the resistance, and the main circuit adopts a five-ring metal film resistor with an accuracy of +/- 1%, which ensures a good signal-to-noise ratio of the whole machine. PCB adopts 1.6mm thick double-sided board, 2.0 oz copper thickness, and full tinning process to good passing performance of large and small currents. First-class PCB quality. With USB PCM2704 module Product All parts and components of this product are and pure in quality; the use of high-quality original parts not only guarantees safety and quality, but also has a long service life, and more importantly, it is a strong that the actual performance can reach the design goals. The pursuit of first-class quality is our consistent aim. Basic parameters: Voltage: dual AC15-0-15V 10W (or dual 12V-0-12V) single 9V 10W Board size: 115x165mm YJ-TDA1541 optical fiber coaxial decoder board (including USB, excluding TDA1541 and SAA7220 IC) Note: the board is blue colour: blue Material: plastic Package Contents: 1 x decoder board 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.