The EK IEM G4 Stereo Bodypack Receiver with IE4 Earphones from Sennheiser is an addition to their evolution series of wireless systems. It features adaptive diversity technology and can be used for a radio monitoring system for live stage, theater, and rehearsal applications. The stereo receiver is equipped with 1680 frequencies tunable in 25 MHz steps and has 20 fixed frequency banks with up to 16 compatible frequency presets and one another 6 user banks with up to 16 user-programmable frequencies. The receiver's menu-driven backlit display shows current frequency, frequency and channel number, metering of RF level, metering of level AF, lock status, and battery status. An auto-lock feature is accidentally altered. Furthermore, this receiver includes a switchable high-boost and a multi-level limiter. The limit is adjustable from -18 dB to -6 dB in 6 dB steps or defeatable (off). Built in a rugged metal housing, it is powered by two 1.5V AA sized batteries by a Sennheiser BA 2015 rechargeable accupack. The earphone output uses a 3.5mm stereo jack socket. Robust bodypack receiver delivering clarity along the spectrum for daily use on stage. 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. Range: Up to 100 meters / 300 '.