Phenyx Pro PTU-5200-2H2B 4-Channel Wireless Mic, Frequency Hopping

Handhelds are the familiar wireless vocal microphones you hold or put on a stand. Bodypacks clip to a belt and take a separate lapel or headset microphone, which leaves the wearer hands-free. This system gives you two of each on one receiver, so a service or assembly can run two singers or speakers on handhelds while a presenter moves around with a headset.

Yes. A single rack receiver handles all four channels, so there is one box to power, one set of audio outputs to patch and four transmitters to look after. That is the practical advantage over buying two separate dual systems, which would take twice the rack space and twice the cabling for the same number of microphones.

If the channel a transmitter is using starts picking up interference, the system moves itself to a cleaner frequency instead of dropping out or buzzing. In a venue with other wireless gear in the building, that is what keeps the microphones usable without someone standing at the rack retuning channels in the middle of an event.