Sennheiser ew 300 IEM G3

The ew 300 IEM G3 from Sennheiser is a wireless stereo audio system that provides terrific versatility in a compact package. The system consists of an SR 300 G3 transmitter and an EK 300 G3 receiver.
Both the transmitter and receiver have 1680 tunable UHF frequencies for interference-free operation. They also have a pilot tone squelch feature for eliminating interference when the transmitter is turned off.