WIRELESS SYSTEM: AP41 OM5 INTERCHANGEABLE MICRO.Band A 522Mhz554Mhz R41 DIVERSITY RECEIVER WIRELESS MICROPHONE SYSTEM WITH H60/OM5 HANDHELD TRANSMITTER.A high-performance portable diversity wireless system with the legendary Audix OM5.Since the mid-90s, the OM5 has become one of the world's most respected portable dynamic microphones. Used on stage, in studios and for broadcast applications, the OM5 has a reputation for clarity, resistance to feedback and the ability to handle SPL over 144 dB without distortion.