This Sennheiser EM 300 G2 wireless receiver operates on the A2 band, from 518 - 554 MHz. Note that it comes without a power supply and antennas. Before buying, check your country's wireless frequency regulations as some frequency ranges may be illegal to use.

To use this Sennheiser EM 300 G2 wireless receiver, you'll need to get your own power supply and antennas. First, connect the power supply to the receiver and make sure it's properly plugged in. Then, attach the antennas. When using, always check your local wireless frequency laws to avoid any legal issues. As for maintenance, keep the receiver in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. Also, when not in use, turn it off to save energy and extend its lifespan.