This Sennheiser EM 100 G2 wireless receiver operates within the 626 - 662 MHz frequency range. Note that due to this frequency range, it's not legally usable in the U.S. Before buying, check your country's wireless frequency rules as some ranges are illegal in certain countries. It comes without a power supply and has only been power - tested, with no antennas included.

Using this Sennheiser EM 100 G2 wireless receiver is easy. First, make sure you have a suitable power supply as it's not included. Then, connect it to your audio system. Before turning it on, double - check your country's frequency laws. When using, keep it in a place where there's less interference. As for maintenance, keep it clean and dry. Don't expose it to extreme temperatures or moisture. If you face any issues, refer to the manufacturer's support for help.