SZM–HT21 2.1 Channel Bluetooth 5.0 Subwoofer Amplifier BoardUpgrade your audio system with the SZM–HT21 amplifier board. Designed for clarity, durability, and powerful sound, it is the perfect choice for home entertainment or DIY audio projects.Key FeaturesBluetooth 5.0 connectivity for stable wireless pairingDual channel output with subwoofer support for deep bassHigh fidelity sound with low distortionEfficient heat dissipation for long-lasting performanceCompact design suitable for multiple setupsWhy Choose SZM–HT21Oxygen-free copper for superior signal qualityShielding mechanism to reduce interferenceDurable aluminum alloy shell for protection