B003ZVSE5O Sennheiser Consumer Audio Compatible with Sennheiser EW 300-2IEM G3 – In-ear Monitoring System – A-Range (516 – 558 MHz)

Includes 2 each EK300 IEM G3 body pack receivers, 2 each IE4 ear buds, and 1 SR300 G3 rack-mountable stereo transmitter with GA3 rack kit.
42 MHz bandwidth: 1680 tunable UHF frequencies for interference-free reception
Enhanced frequency bank system with up to 16 compatible frequencies
Ethernet port for connecting to the Wireless Systems Manager (WSM) software for control via computer – this delivers a good overview of monitoring and professional data management for multi-channel systems
Sturdy metal housing with illuminated graphic display