Product Review

Function
1. Mic Vol1/2
Rotate the corresponding knob to adjust the overall volume of two microphones.
2. TONE 
Rotate this TONE knob to adjust the bass/treble volume of microphone. When turning this knob from 0 to 10, the deep sound of microphone will gradually become shrill.
3. ECHO
Rotate this ECHO knob to adjust reverb effect of microphone. When turning this knob from 0 to 10, the reverb effect will get stronger.
4. MUSIC VOL
The volume of background music from TV, computer or smartphone can be increased by rotating clockwise. 
Preparation
1.After connecting N3 to the power supply, you need to press the power switch and the indicator light will be on when powered successfully. (Note: The AC adapter input is 100V-240V and output is 12V.)
2.You can choose TV, computer or smartphone to plug to IN RCA interfacce via RCA line. Speaker is linked to OUT RCA interface via RCA line.
3.As for the microphone, just plug them into MIC1 or MIC2. Then preparation is finished, you can start karaoke. (Note: If using condenser mic, extra power will be needed.)
Karaoke and mixing
1.Above all, You can rotate the MUSIC VOL to adjust the volume of background music from TV, computer or smartphone
2.Rotate the corresponding knob to adjust the overall volume of two microphones.
3.Rotate TONE knob to adjust the bass/treble volume of both two microphones.
4.Rotate ECHO knob to adjust reverb effect of both two microphones.
How to connect with TV
1.If TV and soundbar/speaker are connected via AUX jack, just feed TV audio to N3 "In" and connect through "Out" to soundbar/speaker. 
2.If there are both AUX and optical input on soundbar/speaker, you can just plug the K036 to the AUX jack. 
3.If TV and soundbar are connected via optical jack or through AV receiver, we recommend to feed N3 audio from its "Out" to TV input.