Features: 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 connect 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. Specifications: Component: PCB+Metal Size: about 16x14x6cm/6.3x5.51x2.36inch Model: 200W ok amplifiers board Working voltage: double group AC18-26V Rate power: 100W+100W Impedance: 4Ω~8Ω Working voltage: voltages regulator with power output of over 100W between two set of AC18V-26V Potentiometer spacing: 2.4cm Chip type: import disassembly tube A1633 C4278 Package Includes: 1pc Amplifiers Board note: Output shortcircuit is strictly prohibited. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.