The Sennheiser ew 300 IEM G2 wireless in-ear personal monitor system is everything you need for professional in-ear monitoring in any context. It features the ew 300 IEM G2 rackmount transmitter, the ew 300 IEM G2 bodypack receiver, high-quality in-ear personal monitors, a power supply, and a rackmounting kit. The super-small, rugged easy-to-operate Sennheiser receiver can be switched from stereo to double mono so you can have the mix in one ear and your individual signal in the other. It is also protected against accidental activation or shut off and includes external contacts for charging with optional battery pack and charger. 9 frequency banks with 12 presets each mean you'll always easily find a clean channel. 1440 tunable UHF frequencies.