Events, conventions, theme parks, and similar venues have common requirements. First, they are large areas, with big crowds, and lots of noise. Coordination of team members is a must, and of course, security is always a key issue making two-way radios essential.
You need a radio that will perform well both indoors and outdoors, so we recommend UHF radios. You also want to make sure the radio has a strong signal to penetrate structures and keep everyone in communication range, so we recommend 4 or 5 watt radios.
Running a zoo, aquarium, or water park? You might want to consider waterproof radios. Also, you want to make sure the audio is loud enough to be heard over all those noisy crowds. And for museums, they must also be usable in quiet areas, having whisper mode might be good.