Wireless Headsets

[JugglingReferee]

Hello.

I'm looking to purchase a wireless headset for officials' training purposes.

Do you know of a reputable product?

I'm looking for the on-field official to wear a device. It has to be non-intrusive. It should be as small as possible. (However, I do recognize that with decreased size comes increased price, so all sizes will be considered.) It should have the ability for two-way communication with the on-field official and the off-field evaluator/trainer. Perhaps the official's mic will be a small clip on mic, and the speaker will wrap around his ear.

If you know of such a product, could you please let me know?

Thanks!