This Sennheiser EM 100 G2 wireless receiver operates in the 518 - 554 MHz range. Note that it doesn't come with a power supply or antennas. Before buying, make sure to check your country's wireless frequency regulations as some frequency ranges may be illegal in certain countries.

Using this Sennheiser EM 100 G2 wireless receiver is simple. First, you'll need to get a suitable power supply and antennas as they're not included. Connect the power supply to the receiver and attach the antennas properly. When you turn it on, it'll start working within the 518 - 554 MHz range. But remember, check your local laws about wireless frequencies before using it. As for maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If there's any dust, you can gently wipe it with a soft cloth.