This Sennheiser EM 300 G2 wireless receiver operates on the A2 band from 518 - 554 MHz. Note that it doesn't come with a power supply or antennas. Before buying, make sure to check your country's wireless frequency regulations as some frequencies may be illegal in certain areas.

To use this Sennheiser EM 300 G2 wireless receiver, you'll need to connect an external power supply and antennas as they are not included. First, find a suitable power supply that matches the receiver's requirements. Then, connect the antennas properly to ensure a good signal. When using it, keep in mind to check your local wireless frequency laws to avoid any legal issues. For maintenance, keep the receiver in a dry and clean place. Wipe it gently with a soft cloth if it gets dirty. Don't expose it to extreme temperatures or humidity as this may affect its performance.