Specification:100% Brand New And High QualityPCB 2mm thick double-sided gold-plated plate to ensure good current size by performance.The ratio of signal transmission distance directly with the silver signal line installed to shorten the N times! Only 5 wiring and panel control switch is connected, on the realization of the function control relays and LED display, than similar products reduce doubled wiring, compact, ultra-thin chassis can pretend to be, the more convenient installation! Is assembled fever amplifier, preamp best choice!For buyers convenient installation, the terminal small white board and LED are not welded.Note:The selector switch screw of the signal board is 8.8MMTo facilitate installation, the terminal small white board and LED lights are not on welding, just for DIYTechnical parameters:Operating voltage: AC (AC)=12-15VPCB dimensions: 98 * 42mmSelector switch board size: 60 * 42mmPackage included:1 x 4-channel stereo audio signals select board + RCA Block1 x 5-pin 50CN cable1 x 3-pin 35CN cable