This is a amplifier board with wiring terminals and dual audio channel of 15W plus 15W, which is applicable for 4-8Ω 10-50W speakers. And it is of small size and high audio amplification with wide application. Features: 1. Excellent sound quality: Delicate and gentle high pitch without obvious harshness; rich, strong and freely retractable low pitch. 2. High fidelity amplifier board without current surge sound at startup and static state noise. 3. The printed circuit board has reasonable wiring and compact components layout. 4. With small volume and high audio amplification, it has wide application. 5. Applicable for 4-8Ω 10-50W speakers. Specification: Input Voltage: DC 9-15V (DC 12V recommended) Power: 15W + 15W Peak Power: 30W + 30W Output Impedance: 4-8Ω Total Length: 7.8cm/3.07in Height: 4.3cm/1.69in Weigh: Approx. 53g/1.9oz Packing list: 1 * Amplifier Board 1、Excellent sound quality: Delicate and gentle high pitch without obvious harshness; rich, strong and freely retractable low pitch.? 2、High fidelity amplifier board without current surge sound at startup and static state noise.? 3、The printed circuit board has reasonable wiring and compact components layout. 4、With small volume and high audio amplification, it has wide application. 5、Applicable for 4-8Ω 10-50W speakers.