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 legal for use in the U.S. Before buying, make sure to check your country's wireless frequency regulations as some ranges may be illegal in certain countries. This unit comes without a power supply and has only been power - tested, and antennas are not included.

Using this Sennheiser EM 100 G2 wireless receiver is straightforward. First, you'll need to get a compatible power supply as it doesn't come with one. Connect the power supply properly to get the unit up and running. When it comes to antennas, you'll have to purchase and attach them separately. Before using, always check your country's wireless frequency laws. Since this unit operates in the 626 - 662 MHz range, it may not be legal in some places. To maintain this receiver, keep it in a dry and clean environment. Avoid exposing it to extreme temperatures or humidity. If you notice any issues during use, consult the Sennheiser support team for help.