This Personal PA Tour Guide System is a lightweight, multi-channel system that helps people with hearing difficulties listen directly to the guide and control their own volume. This features eight selectable frequencies, which allows multiple tour groups to operate in the same vicinity, simultaneously, with no crosstalk or interference. No installation required -- save time and money. Ensures wireless/effortless communication between guide and participants. Combines superior audio with easy-to-use controls. Designed to meet Americans with Disabilities Act (ADA) accessibility requirements. NOTE: The Personal PA Tour Guide System is approved by the FCC for operation in U.S. markets. The system cannot be used in all countries. Check with your governmentacute;s radio regulations for 72-76 MHz operation.