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 laws before buying.

To use this Sennheiser SR 300 IEM G2 wireless transmitter, first, make sure you have a compatible power supply as it's not included. Then, connect an external antenna if you have one since the unit doesn't come with an antenna. Before using it, double - check your country's wireless frequency laws because the 630 - 662 MHz range may not be legal in some places. When it comes to maintenance, keep the transmitter in a dry and clean place. Avoid exposing it to extreme temperatures. If you encounter any issues, refer to the manufacturer's troubleshooting guide.