HE Series headset microphone is ideally suited for vocal sound and speech application which requires much freedom of movement. L1: Standard 3.5mm single(double) plug L2: SENNHEISER type 3.5mm stereo plug L3: Special thread type 3.5 single plug P3: AKG type 3pin mini XLR(3p)or other P4: SHURE type 4pin mini XLR(4p)or other
