This Galaxy Audio AS-1100 wireless IEM system operates in the 584 - 607 MHz range. Note that it doesn't come with a power supply, antennas, or screws for mounting the bracket to the transmitter. There's a known issue where the battery door on the bodypack is broken and has tape residue.

To use this Galaxy Audio AS-1100 wireless IEM system, first, you'll need to get your own power supply, antennas, and screws for mounting the bracket to the transmitter. When you're ready, connect the necessary components and turn on the system. Be aware that the battery door on the bodypack is broken, so handle it carefully to avoid further damage. Since there's tape residue on the bodypack, you can clean it gently with a soft cloth. For maintenance, keep the system in a dry and clean place. Don't expose it to extreme temperatures or moisture. Regularly check the connections to ensure a stable signal.