Using this Sennheiser EM 500 G3 Wireless Receiver is easy. First, connect the correct power supply that comes with the unit. Make sure to check your country's wireless frequency laws before using it, as some frequency ranges might be illegal. There are no antennas included, so you'll need to get your own. As for maintenance, keep it in a dry and clean place. If you have any issues, refer to the software revision 1.7.7 for troubleshooting information.