This Sennheiser EM 500 G2 wireless receiver operates at 740 - 776 MHz and is for use outside the U.S. Before buying, make sure to check your country's wireless frequency regulations as some frequency ranges may be illegal. It comes without a power supply and antennas. Note that the casing shows some wear.

Using this Sennheiser EM 500 G2 wireless receiver is simple. First, ensure it's suitable for your country's frequency laws. You'll need to get a separate power supply and antennas to use it. When setting it up, place it in a location with good signal reception. As for maintenance, keep it clean and store it in a dry place. If you notice any issues, check the connections and make sure all parts are working properly. Remember, the casing has some wear, so handle it with care.