LyxPro ERP-10 in-Ear Monitors with Professional, Universal Fit Earphones for Musicians - Detachable Cables, Carrying Case & 6 Pairs of Tips for Studio or Stage

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.