High-Performance Output: Experience powerful audio amplification with our amplifier board designed for DIY enthusiasts. Custom Speakers: This board is perfect for creating custom wireless speakers, running smoothly between 9-24V DC. Advanced Treble and Bass Control: Customize your audio experience with dedicated treble and bass controls. Our amplifier board is perfect for audiophiles who want to fine-tune the sound to make you feel like you're at a live concert or theater. Versatile Connection with BT: Adopting the latest BT 5.0, it enables seamless wireless connection up to 49 feet in open space. Powerful Features: This expansion board is equipped with multiple protection mechanisms to safe operation. It includes overheat protection, circuit protection, and voltage regulation to protect your devices. Voltage:24 Volts Maximum Supply Voltage:24 Volts (DC) Minimum Supply Voltage:12 Volts (DC) Mounting Type: Mount Colour:Black Material:Plastic Size:11x7x2.1cm Package Contents: 1 * Power Amplifier Board 1 * Protective Shell 1 * Screwdriver 1 * Knob 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.