two-way :

intercom communication referee full-duplex tour guide Portable PAs Vlogger SoundField GPS triggered DSLR Interpretation Wireless Audioguides

GPS Audio Tour

MTS-300-DGB system is a cost-effective system for your boat or bus tour!
♦ To enjoy your tr ...

Our MTS-300 can do more than you imagined!
♦ To enjoy your trip on vehicles (buses/cruises/ ...