Features: 1. Strong Compatibility, Compatible With Various Speakers 2. Knob Type Potentiometer Design, Easy To Adjust The Power On And Off 3. With Reverse Connection Protection, Overvoltage Protection, Undervoltage Protection, Overtemperature Protection, Short Circuit Protection. 4. Self-Recovery Overheating Protection. 5. Widely Used In Modified Speakers, Power Amplifier Equipment And Car Bluetooth Equipment. Description: Product Name: 2.1 Channel Bluetooth Audio Power Amplifier Module Product Model: -E100H Powersupply: DC 9-24V/5A Or Above Bluetooth Version: 5.1 Audio Channel: 2.1 Channel Input : Bluetooth+Aux+U Disk+Usb Sound Card Audio Output: Left And Right Channels + Subwoofer Volume Adjustment: High-End Encoder Knob Adjustment, Smooth Feel Output Power: 50Wx2(Left And Right Channels)+100W(Subwoofer) Satellite Box (Left And Right Channel) Suitable Speaker: 10W-100W /4-8 Subwoofer(Subwoofer)Adapter Speaker: 20W-100W /2-8 Protection Mechanism: Over Voltage, Under Voltage, Over Temperature, Dc Detection And Short Circuit Protection Uniquefunction: Support Audio-App Control Frequency Range: 20Hz-30KHz Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use size: Dimensions after installation are approximately 82 x 84 x 24mm Material: ABS colour: As shown Package Contents: 1 x Bluetooth Audio Amplifier Board Module Kit 1 x Screwdriver 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.