This Sennheiser EM 300 G2 wireless receiver operates in the 626 - 662 MHz frequency range. Note that it doesn't come with a power supply or antennas. Due to its frequency range, it's not legally usable in the U.S. Before buying, check your country's wireless frequency laws as some frequency ranges may be illegal in certain countries.

Using this Sennheiser EM 300 G2 wireless receiver is straightforward. First, you'll need to get a suitable power supply since it's not included. Connect the receiver to your audio system. As for antennas, you'll have to purchase them separately and connect them properly. Before using, always check your country's wireless frequency laws. If it's not legal in your area, you won't be able to use it. To keep it in good condition, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. When not in use, turn it off to save energy and extend its lifespan.