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 ranges may be illegal in certain regions. It has only been power - tested.

To use this Sennheiser EM 100 G2 wireless receiver, first, you need to get a suitable power supply as it's not included. Connect it to your audio system. Remember to check your local wireless frequency laws before using it. When it comes to maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures. If there are any issues, consult a professional or the Sennheiser customer service.