Sennheiser Wireless Microphone SystemFull control over your performance everywhere, every day. The G4 In Ear Monitoring Sets are engineered for professional live sound, delivering a rugged all in one wireless monitoring system that lets you hear exactly what you want, when you want it. Whether youre on a small club stage or a large arena, this Sennheiser wireless microphone system puts you in the drivers seat with reliable, high fidelity audio, effortless setup, and a durable build that