1. Audio Power Amplifier Board with 100W + 100W power output and Bluetooth 5.0 wireless connection, AUX input, 2.0 channel stereo output, minimal sound distortion. Features treble and bass control. Additional functions available via app. Note: When using AUX mode, ensure the Bluetooth connection is disconnected.2. High-Quality Sound Experience: This audio power amplifier module includes a high-performance audio chip, AM interference suppression, shielded power inductance, and a low-noise preamplifier for clear highs, deep lows, and balanced sound performance.3. Treble and Bass Adjustment: This digital amplifier board features independent treble and bass controls. Adjust sound settings directly on the module without relying on external devices. Customize audio to suit personal preferences.4. Built-In Protection Functions: The amplifier module includes over-voltage, under-voltage, over-temperature, and short-circuit protection. Includes protective case for added durability.