Features: Professional amplifier microphone preamp board features XH2.54 3Pin shielded cables for background music input and reverberation output, ensuring sound transmission. Includes 32cm 3Pin shielded cables with XH2.54 connectors for both interfaces, while requiring separate purchase of 3.5mm to XH2.54 adapters or doubble head cables for connection. Ideal for home sound enthusiasts, and professional upgrading existing with processing capabilities. Perfectly integrates into home theaters, background music setups, or studio environments when connecting to amplifier modules via shielded sound interfaces. Designed for seamless compatibility with various sound sources, this plastic built preamp board enables flexible expansions and installation in residential or commercial sound configurations. Specifications: Input: 8-36V Type:TB21H/HT21/AS21 Component:Plastic Size:Approx.10x4.7cm/3.94x1.85inch Package Includes: 1 Set Microphone Preamp Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.