The SR IEM G4 Stereo Transmitter from Sennheiser is an addition to their evolution series of wireless systems. It features a wide range of FM radio modulation and can be used with a wireless receiver for a radio monitoring system for live stage, theater, and rehearsal applications. The frequency converter is equipped with 1680 frequencies tunable in 25 kHz steps and has 20 fixed frequency banks, with up to 16 compatible frequency presets and 6 user banks with up to 16 user-programmable frequencies. The receiver's menu-driven backlit OLED display shows current frequency, frequency and channel number, metering of AF level, status transmission, equalizer settings, status lock, and input sensitivity. An auto-lock feature is accidentally altered. Additionally, associated receivers can be synchronized with the transmitter via an integrated infrared interface. This transmitter is built with two electronically balanced XLR / 1/4 "combo sockets, a 1/4" headphone output with headphone volume control, an Ethernet port (RJ-45 for remote network-based monitoring), and a 50 Ohm BNC- type antenna input. Finally, it has a rugged metal housing and includes a 12 V power supply and a GA 3 rackmount kit. Half-rack stereo transmitter in a full-metal housing with OLED display for full control. Easy and flexible wireless synchronization between transmitter and receiver via infrared. Compatible with Sennheiser WSM control software for flexible frequency allocation. Up to 16 compatible channels. Up to 42 MHz bandwidth with 1680 selectable frequencies, fully tunable in a stable UHF range. Transmission Range: up to 100 meters / 300 '. High RF output power (up to 50 mW) depending on country regulations.