You can't use any Wireless Communication System in United States.
Updated: May 9, 2019
Are you using right frequency for Tour guide system?
According to Federal Communications Commission (FCC) in United States. There are limited radio frequency you can use by country. Of course, you want to buy cheapest tour guide system in Amazon. However not all products are following FCC guidelines and eventually YOU might have to pay for fine. Trust me you don't want to know how much is that.
What about Audiotree?
Audiotree Wireless Tour Guide System follows all FCC guidelines so it's ready to use anywhere in US. For Sense-B2.4 it's global frequency, so you can use internationally.
If you are interest or have questions please call 714-710-0106 or visit our website www.eAudiotree.com