Enjoy a tangle-free performance with this Samson wireless microphone system. Its Tone-Key technology blocks signal interference and lets you broadcast high-definition audio sound over 80 operating channels. This Samson wireless microphone system has a battery life of up to eight hours, and the bright LCD screen provides optimal viewing in dark arenas. CONSUMER ALERT Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC's wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones