Unlike other systems, you simply have to push the "Sync" button on the EM G34 receiver to start using it. There are almost 1,700 UHF frequencies with its patented auto-frequency scan that will choose the right frequency automatically. The microphone also has an Ethernet port, so you can operate the system from a remote computer. The Sennheiser EW 365 G3 comes with a rack-mountable receiver, a microphone clip, as well as two antennas and 2 AA batteries. Expect to pay about $1,500 (as of November 2010) for this unit.
This system provides optimum-quality sound, and it does so regardless of the size of the venue. This unit sells for about $1,300 (as of November 2010) and provides you with 200 UHF channels. Its exclusive IntelliScan feature chooses the right channel and automatically adjusts each receiver linked to the microphone. The Audio-Technica Artist Elite Wireless 4240 comes with both the microphone and one receiver.
If you want a wireless microphone at a low price but are unwilling to compromise on the quality of the system, perhaps this unit is for you. The Audio-Technica ATW-314b sells for less than $800 (as of November 2010) and has features of hand-held microphones that cost a lot more. There are 200 channels from which you can choose, either on the transmitter or the wireless microphone. The microphone features a ToneLock squelch to control interference and a red alert light that warns of low batteries, overload and signal loss.
You can buy this unit for less than $280 (as of November 2010), and it comes with both the wireless microphone and the receiver. Not only is it serviceable for vocals, it can also be used as a stand-up microphone for guitars and other instruments. It also has the capacity to reduce noise that's made by handling the mic.