1.This Amplifier Board can be set up in 4.0 mode with four channels at 30W each, 2.1 mode combining two 30W channels with a 60W channel, or 2.0 mode. 2.This Amplifier Board utilizes Bluetooth 5.0 for seamless audio streaming, supporting high-quality audio formats. This ensures top- audio transmission for a superior listening experience. 3.This Amplifier Board offers advanced audio signal processing capabilities. This allows for precise sound customization and control, enhancing the audio output for all your media. 4.This flexibility allows for easy connection to various audio sources and the ability to link to additional I2S audio amplifier boards for complex setups. 5.4.0 mode for channel operation at 30W each, 2.1 mode for a mix of stereo and mono outputs. Product specifications: 4x30W Bluetooth amplifier board Control mode: plug-in power supply Voltage: 12V Power supply current: 10V Rated power: 30A Communication interface: AUX Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:Black Material:PCB Package Contents: 1 x Bluetooth amplifier board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.