The VocoPro FIELD-QUAD-B wireless microphone system allow 4 to 16 users to clearly send their voice simultaneously via 24-bit digital transmission. The handy built-in mixer lets videographers control volume and balance on the fly via the 3.5 mm mixed out or use the four independent balanced outputs to connect to a field mixer. This is mic system requires no set-up or sync and comes in a 4-channel configuration with lavalier microphones. Just insert fresh batteries to power it up and play.