Makes stage or studio performance easier for singers. With the ART MyMONITOR Personal Monitor Mixer you can hear yourself while sending only the mic signal to the main mixer. Just connect MyMONITOR between the microphone and line source and the mixer. Can be AC or battery powered. Dynamic or condenser mics can be used since phantom power comes through the Mic Thru jack from the mixer or other source. Dual headphone jacks.