This Sennheiser ew 100 G2 Beltpack Wireless System operates at 626 - 662 MHz and is for use outside the U.S. Before buying, check your country's wireless frequency laws. Some frequency ranges may be illegal in certain countries. It includes a receiver and a transmitter, but no power supply or antennas.

Using this Sennheiser wireless system is simple. First, make sure it's legal to use the 626 - 662 MHz frequency in your country. You'll need to provide your own power supply and antennas since they're not included. When setting up, connect the receiver and transmitter properly. As for maintenance, keep the system clean and store it in a dry place. If you have any issues, check the connections and make sure all parts are working. Remember, always follow your local wireless frequency regulations.