The Sennheiser EM 100 G1 wireless receiver operates within the 630 - 662 MHz frequency range. Please note it's not for use in the U.S. Before buying, check your country's wireless frequency laws. Some frequency ranges may be illegal depending on the country. This receiver doesn't come with a power supply or antennas. It has only been power - tested.

Using the Sennheiser EM 100 wireless receiver is easy. First, you'll need to get your own power supply and antennas as they're not included. Connect the power supply and antennas properly to start using it. But remember, this product can't be used in the U.S. Always check your country's 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 and humidity. If you notice any issues, don't try to repair it yourself. Contact Sennheiser's customer service for help.