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. Some countries may ban certain frequency ranges.

How to use: First, make sure you have a compatible power supply as this unit doesn't come with one. Connect the transmitter properly to your audio source. As for the antenna, you'll need to get one separately and attach it. Remember, because of the frequency range, it may not be legal to use in the U.S. Check your local wireless frequency laws before you start using it. Maintenance tips: Keep the transmitter in a dry and clean place. Avoid dropping it or exposing it to extreme temperatures. Regularly check the connections to ensure good audio quality.