Features: 1. Bluetooth Digital Amplifier Board, TDA8954TH Chip 2. Type Of Audio Amplification Function 3. 4-8 Output Impedance 4. Two-Channel Digital Amplifier Board 5. 420Wx2 Output Power 1. Product Name: Bluetooth Digital Amplifier Board 2. Product Model: XH-M254 3. Function Type: Audio Amplification 4. Chip type: AD Type 5. Chip model: TDA8954TH 6. Power Supply Voltage: AC24V4V 7. Output impedance: 4-8 8. Number of Channels: Two Channels 9. Output Power: 420Wx2 10. Installation Size: about 133x97mm Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB colour: As Shown Package Contents: 1 x Digital Power Amplifier Board Module 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.