The Shure PG14/PG185 Performance Gear Wireless Lavalier Microphone System includes the PG4 Diversity Receiver, PG1 Bodypack Transmitter, and PG185 discreet Condenser Lavalier Microphone for presenting. With the Shure Performance Gear PG Series Wireless systems you get a reliable, portable system with up to 10 selectable frequencies and frequency agility.