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, check your country's wireless frequency regulations as some frequency ranges may be illegal to use 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 since they're not included. Connect the power supply to the receiver and then attach the antennas. Make sure to check your country's wireless frequency laws before using it. This will prevent any legal issues. As for maintenance, keep the receiver in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. If there's dust on it, use a soft, dry cloth to gently wipe it clean. That's all you need to know to keep this receiver working well.