The TGS Pro 737 is a lightweight, single-channel system that helps tour participants with hearing difficulties listen directly to the tour guide and control their own volume. Ensures wireless/effortless communication between guide and participants. Combines superior audio with easy-to-use controls. No installation required--save time and money. Designed to meet Americans with Disabilities Act (ADA) accessibility requirements. NOTE: This System is approved by the FCC for operation in U.S. markets. The system cannot be used in all countries. Check with your government#180;s radio regulations for 72-76 MHz operation.Disclaimer: FCC rules limit use of this equipment to auditory assistance.