Features: 1. Bluetooth 2.1 Power Amplifier, Multi-Function Power Amplifier Board 2. This Board Uses Two Pairs Of Disassembled A1633C4278 Amplifier Tubes, And The Capacitor Is An ELNA4700UF35V Disassembled Capacitor, Which Has Sufficient Voltage Resistance And Capacity. The Amplifier Has Good Performance, Good Sound Quality, Clear Treble And Powerful Bass. This Board Is Also Designed With A Microphone Input, Which Can Be Used As A , And A Fan Is Added To That It Can Effectively Help Dissipate Heat At Full Power. 3. Can Be Used With A Of Speakers, With High Output Power And Stability 4. The Control Panel Is More Convenient To Install And Operate. 5. Six Field Effect Matching Tubes, Strong Power And Soft Sound Description: 1. Model: Bluetooth 2.1 Power Amplifier, Multi-Function Power Amplifier Board 2. Working Voltage: Dual AC18-26V 3. Rated Power: 100W+100W+100W 4. Frequency Response: 20HZ-30KHZ 5. Impedance: 4-8 6. Distortion: 1% Material: PCB Color as shown Package Contents: 1 x Amplifier Board 1 x Remote Control 1 x English Manual Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use 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.