Audix AP41 OM2 L10 Combo Wireless Microphone System | Frequency: A (522-554 MHz)A combination system that allows for the flexibility of using either the OM2 handheld transmitter or the bodypack system with the ADX10 cardioid lavalier microphone. This package is designed for rental companies, hotels, presentation events, education, and applications where only one transmitter would be required at a time. (Please note: it is not possible to use both transmitters simultaneously see the AP42 C210 combo pack where both transmitters can