This Sennheiser EM 100 G2 wireless receiver operates within the 740 - 776 MHz frequency range. Note that due to this frequency range, it's not suitable for use in the U.S. Also, it doesn't come with a power supply. Before buying, make sure to check your country's wireless frequency laws as some frequency ranges may be illegal in certain countries. This unit has only undergone a power test. It includes antennas but no power supply.

Using this Sennheiser EM 100 G2 wireless receiver is straightforward. First, make sure you have a suitable power supply as it's not included with the product. Connect the antennas properly to ensure good signal reception. Before using it, double - check your country's wireless frequency laws to avoid any legal issues. Since this unit has only been power - tested, handle it with care. For maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you notice any performance issues, it's advisable to consult a professional technician.