This Sennheiser EM 100 G2 wireless receiver operates in the 740 - 776 MHz frequency range. Note that due to this specific frequency range, it's not legal for use in the US. Also, it doesn't come with a power supply or antennas. Before buying, check your country's wireless frequency regulations as some frequency ranges may be illegal depending on where you are.

How to use: First, make sure you've got a suitable power supply as this unit doesn't come with one. Connect it to your audio system. Keep in mind that it won't work in the US due to frequency regulations. Check your local laws before using. Maintenance: Keep it in a dry and clean place. Avoid exposing it to extreme temperatures. Regularly check the connections to ensure a stable audio transmission. When not in use, store it properly to prevent any damage. And always remember to check the wireless frequency laws in your country to avoid any legal issues.