The D900 Bluetooth Amplifier Board is designed to enhance your audio experience with its advanced features and powerful performance. Ideal for karaoke setups, this board integrates a high-quality amplifier chip and supports various input methods. Microphone Features: Includes squawk suppression and independent volume control for both microphone and master volume. Connectivity: Bluetooth 5.0 technology ensures seamless connection up to 10 meters without obstructions, alongside AUX, MIC, FM, USB, and TF card inputs. Sound Customization: Equipped with bass effect adjustment and a high-end aluminum alloy brushed panel for a premium look and durability. Protection Features: Includes safeguards against over-voltage, under-voltage, over-temperature, AC/DC detection, and short-circuit incidents. Important: For maximum performance, ensure the audio input and power supply voltage/current are sufficient. Higher power supply voltage results in greater output power. Specifications: Product Name: 2.1 Channel Bluetooth Amplifier Board Product Model: D900 Bluetooth: 5.0 (unobstructed, 10 meters) Input Sensitivity: 500mV Input Method: Bluetooth+AUX+MICFM+USB+TF card Channel: 2.1 Input Power Supply: DC 12~24V or AC110-220V Adaptive Speaker: 20~100W,4~8 Ohm Output Power: Left and right channel ≤50w Subwoofer ≤100W Protection Mechanism: Over-voltage, under-voltage, over-temperature, AC/DC detection, short-circuit protection Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. Voltage: AC110V Color: Gold Material: Aluminum Alloy+Plastic Package Contents: 1 * Amplifier board 1 * Remote control 1 * DC cable 1 * Power cord 2 * Batteries Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color