Description: Includes all components as the main picture show, but it fitted required by yourself Operating Voltage: DC 12-18 V Plug Size: 5.5 * 2.1mm Input Polarity: inside +; outside - Material: PCB PCB: Approx. 83.1mm * 45mm /3.27x1.78inch Confirmed wiring diagrams and installation instructions Package Includes: 1 xHeadphone Amplifier AMP Board Module Kits+ Case
