This is a transmitter only, and no belt pack is included. It operates in the 626 - 662 MHz frequency range and is for use outside the U.S. Before buying, check your country's wireless frequency regulations as some frequency ranges may be illegal in certain countries. Note that it comes without a power supply and an antenna.

Using this Sennheiser SR 300 IEM G2 wireless transmitter is straightforward. First, make sure you're in an area outside the U.S. and have checked your local wireless frequency laws. As there's no power supply, you'll need to get one separately to power it up. Also, you'll have to arrange for an antenna. When using it, keep it in a proper position to ensure good signal transmission. For maintenance, keep it clean and dry. Avoid exposing it to extreme temperatures or humidity. If you encounter any issues, refer to the Sennheiser official support or documentation.