Sennheiser ew372G2 Instrument Wireless System
If you're using several wireless systems on the same stage, the EW 372 system is definitely what you need. Every frequency you use cancels out lots of frequencies up and down the spectrum, so your choices narrow quickly. This system solves the problem with 1440 switchable frequencies and the ability to automatically scan all 9 banks to find open banks with compatible frequencies. The green backlighted LCD on the EM 300 G2 receiver glows red when there's no signal from the transmitter.

You get peerless dropout-free signal reliability with complete freedom of movement at up to 150 feet. Based around the EM 300 rackmount receiver with 2 removable telescopic antennas, the system features the SK 300 G2 bodypack/instrument transmitter which provides all critical info on its LCD and has external charging contacts for use with optional battery pack and charger. System strengths include: 8 banks of 8 compatible preset channels, one bank of 8 user-selectable channels, current channel bank displays, increased bandwidth, channel and bank indicators, frequency indicators, 4-step battery status display, lock mode with indicator, pilot signal reception with indicator, mute with indicator, 7-step level display for received audio signal, 7-step level display for received RF signal, plus XLR and 1/4" outputs on receiver.