Features Ideal for conducting simultaneous tours both indoors and outdoors and for offering language interpretation Superior Audio Quality - 80 dB signal-to-noise ratio, setting the industry's sound quality standard Choose between 57 channels 100% Digital - Listen receivers are digitally-tuned so transmission won't drift Uses standard alkaline or NiMH batteries Description Product Description The LS-07 15-Person Tour Group System is a great for organizations that wish to ensure their visitors understand every word. This system is ideal for indoor or outdoor tours of any venue and language interpretation as well. The 15-Person System includes a Portable Transmitter and microphone, display receivers with ear speakers, batteries and a carrying case. Also, be sure to consider whether a hand held or noise canceling microphone might be appropriate for your application. You can add any number of receivers to a single transmitter if you need to accommodate more guests. This system is a good size for rentals. Use this system for auditory assistance and language interpretation on tours or in other venues. Great for manufacturers, museums, governments, houses of worship, tour companies, zoos, and board rooms. These products are approved by the FCC for use in the US. Please note that they cannot be used in all countries. Check with your local government or specific regulation with regard to broadcast frequency in your specific country. Note: FCC rules limit the use of this product to assistive listening.