OMNITRONIC UHF E-FLEX 2 is a license-free, two-channel wireless microphone system operating in the UHF 559–575 MHz band. It comprises a receiver and two handheld transmitters using UHF PLL technology, with 16 selectable frequencies, automatic synchronization, separate channel volume controls, balanced XLR outputs, a mixed 6.3 mm jack output, and detachable BNC antennas. The line-of-sight operating range is up to 30 m. A rack kit for 19-inch installation is included.