1. Using high quality materials, product quality is guaranteed.<br> 2. More convenient to use, stable performance.<br> 3. Exquisite and compact appearance, beautiful and generous arrangement of components.<br> 4. with electroplated silver knob, volume adjustment is more convenient.<br> 5. Wide range of applications, suitable for a variety of industrial DIY occasions.<br> 6. Note: Please pay special attention to the output speaker wire can not be short-circuited, otherwise burned out the amplifier tube.<br> Specification:<br> Working voltage: Dual AC15V-18V<br> Output power: 50W+50W<br> Op-amp type: 4122<br> Frequency Response: 10HZ-20KHZ<br> Colour:As Shown<br> Material:PCB+Aluminum+Components<br> The actual product may have slight color difference or difference, which not affect the use<br> Package Contents:<br> 1 * Amplifier Board<br> Only the above package content, other products are not included.<br> 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.