Provide clear, reliable sound during a dual performance or presentation with this Samson Stage 212 microphone system. The IR sync function wirelessly matches transmitters to receiver frequency, and its 200-foot range from the receiver lets you move freely on stage. The balanced XLR mix output of this Samson Stage 212 microphone system merges two receiver signals into one output channel. 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