Dual Input Modes: Enjoy versatile audio options with support for Bluetooth-compatible and 3.5mm AUX inputs. The Bluetooth-compatible 5.0 version ensures higher transmission efficiency and a range of up to 10 meters without obstacles, perfect for your audio power amplifier board needs Adjustable Bass & Treble: Experience rich sound with the 2.1 channel delivering up to 2X50W+100W maximum output power. Fine-tune the audio with adjustable bass and treble knobs for layered sound and powerful bass, enhancing your audio power amplifier module performance rotection Features: Equipped with short circuit, overcurrent, overheat, and reverse polarity protection. When overload occurs, the processor is informed, safeguarding your stereo digital audio amp board from any potential damage High-Quality Components: Made with a copper DC connector and barrier terminal that withstands high currents without heat or damage. Includes a DC head lead compatible with the input power interface for this amp board, ensuring easy connection even without a DC adapter or battery Wide Applications: Ideal for shop displays, home theaters, DIY speakers, and more. For any inquiries or quality issues with the amplifier board, to contact us for a satisfactory response Product Name: 2.1 channel Bluetooth audio amplifier module Product model:-2.1 Bluetooth version: 5.1 (unobstructed, 10 meters) Input sensitivity: 500mV Input method: AUX+Bluetooth Number of channels: 2.1 channels Power supply: DC12-24V/5A or above (the higher the voltage, the greater the output power) Applicable speakers: 20-100W, 4-80 Output power: Left and right channels 50W Subwoofer 100W Product size: 90mm x 83mm x 22mm (The product appearance and printed words depending on the batch, but this does not affect use) Color: As shown Material: PCB Package Contents: 1 * AMP Board 1 * screwdriver (screwdriver color and style are random, No designation accepted.) 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.