This Sennheiser EK 100 G4 wireless camera receiver operates in the 516 - 558 MHz frequency range. Before buying, make sure to check your country's wireless frequency regulations as some ranges might be illegal to use. It has only undergone a power test and doesn't come with batteries.

Using this Sennheiser EK 100 G4 wireless camera receiver is easy. First, ensure you've checked your country's frequency laws to avoid any legal issues. Once you've verified that the 516 - 558 MHz range is okay to use, you can start setting it up. You'll need to supply your own batteries since they're not included. When it comes to maintenance, keep it in a dry and clean place. Don't expose it to extreme temperatures or humidity. If it gets dirty, use a soft, dry cloth to gently wipe it. Remember, this unit has only been power - tested, so handle it with care to ensure long - lasting performance.