SHURE, pg58

Shure BLX24/PG58 Wireless Handheld Microphone System, BLX4 Receiver & BLX2/PG58 Handheld Transmitter BLX Series Wireless System with BLX2/PG58 Handheld Microphone with Transmitter, BLX4 Receiver, and Microphone Clip
  Shure BLX24/PG58 Wireless Handheld Microphone System, BLX4 Receiver & BLX2/PG58 Handheld Transmitter

The Shure BLX24/PG58 Handheld Wireless