The board uses the PT2399 built-in chip to return to sound processing, and the setting is the four amp field effect opTL074 for audio signal amplification and sound processing.
Also added a new 5V output, can be connected to the USB Bluetooth decoder board, more convenient to use.
In addition, the karaoke card also uses a two-way microphone input (compatible with electret microphone)
Working voltage: Double AC12 ~ 15V

Colour: green
Material: plastic
Size: 157x88mm

Package Contents:
1 * Microphone Amplifier Tone Board
NOTE:
This is the front tuning card of the amplifier. Need to be equipped with a post amplifier to use.
If you contact for the first time, you might not understand,
This card is set up with a station amplifier and has no audio output. You need to match a post amplifier. Just import the signal from the preamp.
Pre-tuning signal-input post-amplifier-post-amplifier pushes signal processing to the speaker