Highly and low frequency adjustment: The OK200W amplifiers board is equipped with highly and low frequency adjustment functions, allowing users to freely adjust sound quality according to their needs. Shouting air-cooled: equipped with shouting function and air-cooled heat dissipation design, suitable for shouting scene that require long time use. Microphones input: Supports microphones input, making it convenient to microphones for applications such as shouting and lecture. Highly power output: Provides power output of 200W, ensuring clear and powerful sound effects. Finished product design: The finished board is easy installation and use, without the need for additional assembly, reducing user operating cost. Colour:Green Material:ABS Type: A: Motherboard + electroplated silver knob/B: motherboard<br><br>Package Contents: 1x Amplifier board 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.