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 http://www.fcc.gov/cgb/wirelessmicrophones.
This booster goes the distance.
The Sennheiser AB 3 Antenna Amplifier is for the Sennheiser Evolution Wireless G3 series. The AB 3 amplifier's bandwidth is 42 MHz, rather than the 36 MHz of the AB 2, which it replaces. Bandwidth, when talking about AB boosters, refers to the built-in filters in the unit. The Sennheiser AB 3 antenna head amplifier boosts the signal from a remotely mounted antenna wityh a long cable run, typically 50' or longer. Signal loss from a long cable can be high, and a booster overcomes that loss.