This Sennheiser EM 300 G2 wireless receiver operates in the A2 Band of 518 - 554 MHz. It doesn't come with a power supply or antennas. Before buying, check your country's wireless frequency regulations as some frequencies may be illegal. The software revision is NET.201, and the unit has been power - tested and reset.

To use this Sennheiser EM 300 G2 wireless receiver, first, you need to get a suitable power supply as it's not included. Connect your audio source to the receiver. Check your country's wireless frequency laws before using it to avoid any legal issues. When it comes to maintenance, keep it in a dry and clean place. Regularly check the connections for any signs of wear or damage. If you encounter any problems, you can try resetting the unit as it has been power - tested and reset before leaving the factory.