Features 1.[Stereophonic Sound]: The digital power amplifier board has dual channel stereo sound, providing premium sound, improving the auditory effect and giving you an immersive experience. 2.[Volume Control]: The stereo amplifier board can easily adjust the volume through the built in potentiometer and switch for easy and precise volume control. perfect for DNY speakers. 3.[Stable Power Supply]: The power amplifier board adopts copper DC joint, which can withstand high current and no heat, and the capacitor 470uf35V capacitor ensures the power storage and heat dissipation capacity. 4.[Easy Operation]: The power amplifier board module comes with a compatible DC head cable that can be easily connected to your power supply even if you don't have a DC adapter or battery. 5.[Bluetooth5.0]: The digital power amplifier board adopts Bluetooth version 5.0, can enjoy seamless and efficient connectivity with transmission distances up to Approx. 15m / 49.2ft.. specificationItem Type: Digital Power Amplifier Board Material: PCB Adaptive Voltage: 5-24V Adaptive Speaker: 30W-200W Number of Channels: Left and Right Dual Channels Bluetooth Version: 5.0 Distance: Approx. 15m / 49.2ft Protection Mechanism: Self Recovery Overheat Protection, Self Recovery Short Circuit Protection PackageList1 x DigitalPowerAmplifierBoard 1 x Connected Cord NotePlease note that the digital amplifier board is not suitable for 24V battery power supply, which will probably cause overvoltage damage. If it's metal case, please pull out the Bluetooth antenna.