SHURE, BETA87C

Shure SLXD24/B87C Wireless System with Beta 87C Handheld Transmitter SLXD Series Wireless System with Beta 87C Handheld Transmitter, and SLXD4 Wireless Receiver
  Shure SLXD24/B87C Wireless System with Beta 87C Handheld Transmitter 

The SLXD24/B87C Wireless System delivers transparent, 24-bit digital audio and rock-solid RF performance for a wide range of

Shure QLXD24/BETA87C Handheld Wireless Microphone System, QLXD4 Wireless Receiver & QLXD2/BETA87C Handheld Transmitter QLX-D Digital Wireless Handheld System with QLXD2/BETA87C Condenser Microphone with Transmitter, and QLXD4 Receiver
  Shure QLXD24/BETA87C Handheld Wireless Microphone System, QLXD4 Wireless Receiver & QLXD2/BETA87C Handheld