performance in a 2.1 channel amplifier board, delivering reliable sound and stable operation. Easy to install and use. Input methods include Bluetooth input and AUX input, allowing wireless streaming or wired connections to a wide range of devices. Easy replacement option for 2.1 channel amplifier modules, providing stable and fast connection and broad compatibility with compatible systems. A reliable Bluetooth amplifier module that is a good choice for replacing damaged modules, helping restore or upgrade existing setups. Use scenarios Scenario 1: a damaged amplifier module in a small home audio system or bookshelf speaker setup to restore stereo sound and wireless streaming. Scenario 2: Upgrade DIY audio projects such as building or enhancing a Bluetoothenabled speaker, computer speaker, or compact party system with 2.1 channel amplification. Scenario 3: Add wireless input to an existing audio setup by replacing or upgrading the amplifier module without extensive rewiring, preserving compatibility and performance.