Handheld or Body Pack
Handheld wireless microphones resemble wired mics, without the cord. The speaker and singer can move freely about the space without getting tripped up by long cords. A handheld mic is also useful when there are multiple speakers who need to be heard.

A wireless bodypack transmitter consists of two parts: the bodypack which is a small module that can be attached to the user, and a very small microphone. The microphone can clip-on (referred to as a lavalier) or worn as a head piece (referred to as a headset mic). Since the bodypack transmitter is worn, it is only used by one person. Wireless body packs allow the singer or speaker to move freely for a hands-free presentation.

Antenna Systems
Antenna systems increase range and allow you to tie all the units together in one distribution amplifier. They enable you to combine up to 16 units on just two remote antennas. This is both convenient and an efficient use of space. It can diminish most interference-related problems that occur in a large or set-obstructed venue where wireless units are being run off their own individual antennas.

UHF vs. VHF
Wireless systems come in two types: VHF & UHF. VHF, which stands for Very High Frequency, occupies the low end of the frequency spectrum (basically 89.00 MHz to 216.00 MHz). Wireless began with the VHF frequency band, so there’s a lot of it out there. The chances of running into another VHF system are very high as the FCC designates this low power band for a variety of uses: cordless and cellular phones, radio, TV, pagers, walkie-talkies, etc, as well as other industrial and government signals. On the other hand, systems in the UHF (Ultra High Frequency) band transmit with greater power. The FCC has allocated more banks of frequencies in the UHF band (approximately 450.000 MHz to 999.000 MHz) for broadcast uses. So, even though UHF is becoming increasingly more crowded, it covers a much wider spectrum than VHF. The chances of interfering with another system are less likely.

Frequency-Agile
"Frequency-agile” means having the option to select from multiple channels within a single unit. Almost all the manufacturers on the market offer frequency-agile systems. Don’t settle for anything less. Single-frequency units are dangerous these days. All wireless mics work within existing television channels. If you try to operate a wireless audio system on frequencies that are already occupied by these channels, interference may render your system unusable. There’s nothing worse than spending a lot of money on a unit, excited to try it out, and hear nothing but the morning news from your local TV station. This is why frequency-agile is so important, especially when coordinating multiple wireless units.

Frequency Coordination
All wireless technology, including wireless mics, in-ear monitors, walkie-talkies, wireless communication devices, digital lighting, etc, must be carefully coordinated so that the frequencies won’t interfere with each other or other local RF sources. The best way to minimize most types of interference, whether you are dealing with a single wireless unit or multiple units, is by first doing some frequency coordination. As your wireless dealer, Wireless First will coordinate you wireless system with the available frequencies in your area.