Audio Amplifier Board From Damgoo With Bt 5.0, 10W 15W 20W 2.0 Dual Channel ???I Am small, But I Have High Compatibility? The DC power supply commonly used for wide voltage input (DC8-24V) can provide energy for me, and at the same time, I can connect 2-8? speakers; ???I Am Small, But My Power Is Not Small"?I can provide a maximum power output of 20W * 2, if you use more than 20w * 2, it is recommended to add a heat sink on the back of this board; ???I Am Small, But I Have Many Functions?With the latest BT 5.0 connection protocol, the power consumption is smaller and the transmission distance is farther. The same multi-function button can easily realize the volume + volume-, play / pause function; ???I Am Small, But I Am Not Vulnerable? I have three protection mechanisms, reverse connection protection, short circuit protection, and overheat protection, which means I am not easy to damage. ???7 * 24 hours after-sales service? Paying attention to customer experience and satisfying customers is our service tenet. If you have any questions about the product, or the product has quality problems, please contact us at any time, we will give you a satisfactory answer.