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 you buy, make sure to check your country's wireless frequency regulations as some frequencies may be illegal in certain areas.

To use this Sennheiser EM 100 G2 wireless receiver, you'll need to provide your own power supply and antennas. First, connect the power supply to the receiver and ensure it's properly plugged in. Then, attach the antennas to the appropriate ports. Make sure the receiver is within the 518 - 554 MHz frequency range that it supports. Before using, always check your local laws about wireless frequencies to avoid any legal issues. For maintenance, keep the receiver in a clean and dry place. Avoid exposing it to extreme temperatures or moisture. If there are any issues with the performance, check the connections of the power supply and antennas first.