This product features high-performance materials and is designed for use with high-fidelity audio power amplifiers requiring high power output. The TPA3116D2 is a Class D amplifier IC from Texas Instruments, known for its excellent performance parameters, with a maximum modulation frequency of 1.2MHz and low distortion at high power output. Red and gray ring inductors are specifically designed for digital power amplifiers, offering low loss, wide bandwidth, and high fidelity. The 684 film capacitor is an audio-grade component suitable for amplifier circuits, providing low loss, high bandwidth, and high-fidelity sound reproduction. The board supports two audio input options: AUX and Bluetooth, combining dual functionality in one unit. Volume is adjustable via a potentiometer with an integrated switch, allowing easy control, making it ideal for DIY speaker projects. Equipped with a copper DC female jack and screw terminal connectors, the board can handle high current with minimal heat buildup, ensuring safe and reliable connections that reduce the risk of short circuits. Features Bluetooth version 5.0 for improved transmission efficiency and extended range. Note: The power switch on the board acts as a standby switch. When turned off, the device enters a low-power standby mode. To fully disconnect power, remove the DC plug, especially during extended periods of non-use. Color: Black Material: Plastic Size: 84 x 52 x 24mm Package Includes: 1 x Amplifier Board Note: Lighting and display differences may cause slight variations between the product color in images and the actual item. Measurement tolerance: ±1–3 cm.