♪♪♪ Ch1/2 Are Mono Channels Mic/Line Inputs With 2-Band Eq , Ch3/4 Is Stereo Rac R/L Inputs Channel As 3rd Channel Or 3/4 Rac Inputs Mono Channels With 2-Band Eq. | ♪♪♪ 4 Channel Mixer Have Two Ways Of Audio Output Device：*6.35mm Mono Output Of Monitor Headphones Or 3.5mm Sterero Monitor Headphones With Microphone *Audio Stereo Xlr Interface Output Of Active Speaker . All Two Can Work Simultaneously. | ♪♪♪ When A Headset With A Microphone Is Inserted, The Microphone Function Of The Headset That Needs To Be Used At The Same Time Will Be Synchronized To The Audio Of The First Channel And Output Together | ♪♪♪ Mixer Board Independent Channel Adjustment Gain Signal, 2-Eq Band, 88 Dsp Effect Send Channel On/ Off , Volume Adjustment And Total Output Channel Effect Volume And Total Output Volume And Monitor Headphone Volume Adjustment. | ♪♪♪ Usb Port Has Three Functions * Supports Power Supply* Compatible With Smartphones, Computers, U Disk Mp3 Music Playback*Support Computer And Mobile Phone Recording.A Usb To Lightning Or Type-C Adapter Is Required To Connect The Mobile Phone To Play Music Through The Usb Interface Of The Mixer | ♪♪♪ Music Mixer Has Three Ways Of Music Playback: *Bluetooth Input Is Compatible With Bluetooth Connected Devices,; *Usb Port Can Be Plugged Into Usb To Usb Data Cable Add Usb To Lightning Or Typc-C Adapter Or Usb To Type-C Or Lightning Cable ; *4/5 6/7 Channel Stereo Audio Input Can Be Plugged Into Rac R/L To 3.5mm Audio Cable. | *If You Use A 48v Condenser Microphone, Please Press The +48v Phantom Power Switch. *When Channel 1 Is Using A Guitar, Please Press The Hi-Z Switch. Cut Switch, *Please Press The Usb/Line Switch To Input Audio Via Usb | ♪♪♪ Package Contents: Mixer *1+ Charge Cable*1+Usb Adapter Plug*1