AKG IVM 4500 wireless IEM in-ear monitoring set

I bought this system not too ago and never use it. IVM4500 IEM is the only wireless in-ear monitoring system featuring binaural room simulations that provides musicians, vocalists and presenters with a uniquely natural listening experience. It's high-end radio electronic radio circuitry includes a manual radio signal attenuator for more robust radio reception in crowded environments. An enhanced frequency setup shows the number of free channels. Integrated preset groups support TV channels and allows the operation of up to 14 channels simultaneously within the same frequency band. A quick frequency swap function supports monitor engineers to listen to the audio signals of different channels. An optional network remote control allows frequency coordination and monitoring of multi-channel systems via PC software Audio Architect™, Apple iPhone/iPad/iPod® or via Soundcraft Vi consoles. DIVERSITY RECEIVER two matched antennas ensures reliable transmission SOPHISTICATED, NARROW RF FILTER DESIGN for best radio signal performance HIQNET NETWORK REMOTE CONTROL AND MONITORING from PC via Harman software Audio Architect™, Apple iPhone/iPad/iPod® or Soundcraft Vi consoles PATENTED DSP FILTER TECHNOLOGY for reference sound quality QUICK FREQUENCY SWAP FUNCTION to support monitor engineers