Features: Experience quality sound with the Digital DualChannel Amplifier Module, TDA7492 chip Amplifier board. The Bluetoothcompatible power amplifier module adopts TDA7492P power amplifier chip, which has excellent power amplifier effect, good signal transmission ability, and high software compatibility. With 50W+50W dualchannel power amplifier board with excellent sound quality. The DIPswitch can be directly adjusted after amplifiergain, better promoting speaker damping. It is suitable for speakers with 4, 6, 8, and 16ohms (8ohms is the best). Enjoy the convenience of wireless audiosstreaming with BluetoothcompatibleV4.0 compatibility and a wide voltage input of DC8V to 25V. Perfect for various scenarios such as home entertainment systems, parties, and outdoor gatherings. Transform any normal speaker into a powerful Bluetoothcompatible speaker effortlessly. Specifications: Chip: TDA7492P Power: 2.1interface DC8-25V Power Supply Audiosinput: CSR8635 Bluetoothcompatible chip, BluetoothcompatibleV4.0 Output impedances:8 is best(can drive 4,6,8,16 impedances speaker) The dialswitch can be much more convenient to directly adjust the rear stage amplifier gaining ,then better promoting the impedances and louder speaker Note: Due to the light and screen setting difference, the item color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes: 1Set x TDA7492P Bluetoothcompatible Amplifier Board AUX