This Sennheiser SR 300 IEM G2 wireless transmitter operates in the 630 - 662 MHz range. Note that it doesn't come with a power supply or an antenna. Due to the frequency range, it's not legal for use in the U.S. Always check your country's wireless frequency regulations before buying, as some frequency ranges may be illegal depending on the country.

Using this Sennheiser SR 300 IEM G2 wireless transmitter? First, you'll need to get your own power supply and antenna since they're not included. Before you start using it, check your country's wireless frequency laws to make sure it's legal to use in your area. When you're ready to use it, connect the power supply and antenna properly. To keep it in good shape, store it in a dry and cool place. Avoid exposing it to extreme temperatures or moisture. If there are any issues, refer to the official Sennheiser support resources for help.