Samson's Concert 99 Earset combines 80 channels of high-definition audio and extreme reliability into a rugged all-metal, rack-mountable chassis with a stage-ready backlit display. With simple 1-touch setup, convenient monitoring, a 300' UHF operating range and impressive transmitter battery life, this frequency-agile system offers unprecedented value to presenters, educators, house of worship speakers, fitness instructors and others in search of reliable wireless freedom. In both single and multi-system arrangements, the CR99 Wireless Receiver offers 80 total operating channels, selecting the best frequency option for your area. Quick to setup, the CR99's Group scan helps avoid conflicting frequencies, while its IR sync function allows users to wirelessly match the transmitter to the receiver's operating frequency. The CR99 receiver features a bright, backlit LCD for monitoring on dark stages, even at long distances. The LCD also shows the exact battery life of your transmitter, along with the channel number and its corresponding UHF frequency.