Make sure your band is heard at your next gig with this VocoPro digital wireless system. Its receiver offers nine frequencies for minimal interference, and its wide frequency response range of 50Hz - 20kHz delivers natural-sounding vocals. This VocoPro digital wireless system comes with two handheld microphones and two headset microphones for versatile options among vocalists. 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