1. 50W+50W+100W, 2.1-Channel Bluetooth Power Amplifier Module, AUX+Bluetooth Audio Input, Subwoofer+Left And Right Channel Output 2. 2.1-Channel Bluetooth Digital Amplifier Board, Aux Audio Input, Independent Adjustment Of High And Low Sounds, Outstanding Sound Quality 3. Only When The Audio Input Is Sufficient And The Power Supply Voltage/Current Is Sufficient, There Will Be Sufficient Output Power! 4. The Higher The Power Supply Voltage, The Greater The Output Power, And The Smaller The Speaker Impedance, The Greater The Output Power! Please Make Sure That The Power Of The Adapted Power Supply Is Greater Than The Actual Working Power Of The Amplifier! 5. Easily Connect Your Music Devices 1. Product Name: 2.1-Channel Bluetooth Audio Amplifier Module 2. Bluetooth Version: 5.0 (Unobstructed, 10 Meters) 3. Input Sensitivity: 500mV 4. Input Method: AUX+Bluetooth 5. Number Of Channels: 2.1 Channels 6. Power Amplifier Chip: TPA3116D2(With Am Interference Suppression Function) 7. Adaptable Power Supply: DC 12~24V/5A Or Above (The Higher The Voltage, The Greater The Output Power) 8. Adaptable Speakers: 20~100 W, 4~8Ω 9. Output Power: Left And Right Channels Less than 50W, Subwoofer Less than 100W 10. Protection Mechanism: Overvoltage, Undervoltage, Overheating, Dc Detection, Short Circuit Protection 11.Colour:As Shown 12.Material:ABS+PCB Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Package Contents: 1 x Upper Cover 8 x (M2 x 4 Model Mm) Screw 1 x PCB Board 4 x M2x16 Model Copper Pillar 4 x M2x5+4 Model Copper Pillar 1 x Lower Cover 1 x Power Adapter 1 x Screwdriver 5 x Button Cap