Engage your audience with this Samson AirLine UHF wireless headset system. The sweat-resistant headset microphone delivers clear audio signals via the AH9 transmitter, while the rechargeable battery lasts for up to 8 hours, making it perfect for outdoor exercises. This Samson AirLine UHF wireless headset system features 100 available channels to ensure clear, secure connections. 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