High-Performance Amplifier: Experience superior audio quality with the ZK-MT21, featuring a 2.1 channel configuration that delivers a powerful 50W x 2 + 100W output. Ideal for audiophiles seeking rich, dynamic sound. Advanced Bluetooth 5.0 Technology: Stream your audio seamlessly with the latest Bluetooth 5.0 technology. This amplifier board ensures stable and fast wireless connections with a wide range of devices. Enhanced Bass Control: Tailor your listening experience with adjustable bass settings. This amplifier provides deep, thumping bass, perfect for enhancing your home theater or audio projects. Versatile Usage: Suitable for various audio applications, from DIY projects to home audio systems and more. Its robust design ensures durability and consistent performance. Bluetooth version: 5.0 (unobstructed, 15 meters) Input sensitivity: 500mV Input method: AUX+Bluetooth Number of channels: 2.1 channels Applicable speakers: 20-100W, 4-8Ω Protection mechanism: anti-reverse connection, overheating, overcurrent, short circuit protection Applicable power supply: DC12-24V/5A or above (cannot be connected to 24V battery pack) Output power: left and right channels Less than 50W, subwoofer Less than 100W Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:Black Material:plastic Package Contents: 1 x Subwoofer Amplifier Board