Features: LM4610 tone board, integrated with AD828 preamplifier module, provides excellent sound quality improvement.. Stable and reliable Sound output, suitable for variety Sound equipment.. Ideal for audiophiles, DIY electronics enthusiasts, professional grade Sound amplification for customized home or car Sound systems. Perfectly integrates into home theaters, automotive sound upgrades, or studio setups requiring powerful subwoofer output and precise adjustments. Plug and play design ensures quick installation, while metal plastic build optimizes heat dissipation for prolonged high performances use. Specifications: Component:Metal+Plastic Type:Fixed/Separated Working voltages: 12-24V 9-16V Potentiometer spacing: 22mm Size:Approx.10x5cm/3.93x1.96inch Package Includes: 1Pc Preamp Amplifier Board note: 1.During installation, the 3D potentiometer should be strictly ground 2.The positioner can be ungrounded, because it is controlled, and there will be no interferences. It needs independent power supply, otherwise there will be interferences.