Let loose while performing with this Samson AirLine wireless system. The operating range of 300 feet gives you the freedom to move around, while the sweat-resistant fitness headset microphone delivers crisp sound quality via the AH7 micro transmitter. This Samson AirLine wireless system has balanced XLR and unbalanced 0.25-inch outputs for expandable connectivity options. 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