Output Power：300W+300W amplifier board with treble and bass control, built-in TPA3255Chip, DC 19-51V, BT 5.2 and AUX inputs, 2.0 channel stereo AMP board for DIY wireless speakers Protection Mechanism: This amplifier board is equipped with multiple protection features, including overheat protection, overvoltage protection, and short-circuit protection. These safeguards ensure the protection of the device and connected speakers during high-power usage, preventing damage. Multiple Input Methods: - Amplifier board supports Bluetooth 5.2, USB sound card, USB flash drive, AUX. allow for a wide range of devices to be connected to the amplifier board, including smartphones, laptops, tablets, and other audio sources. Independent Adjustment - Three knobs independently control the treble, bass, and a multifunctional volume knob that integrates functions such as pause, skip song, and power on/off Technical Support - Rest assured about your amplifier board DIY as we provide professional pre-sales and after-sales services. Please contact us if you encounter any issues. Kindly note that we offer you free lifetime after-sales technical support. 600W Audio Amplifier Board with Treble and Bass Control, TPA3255 Chips, DC 19-51V, Bluetooth 5.2 and AUX Inputs, 2.0 Channel Stereo AMP Board for DIY Wireless Speakers