This Sennheiser EM 100 G2 wireless receiver operates in the 518 - 554 MHz frequency range. It's important to note that this unit doesn't come with a power supply or antennas. Before you buy, make sure to check your country's wireless frequency regulations as some frequency ranges may be illegal in certain areas. It has only been power - tested.

Using this Sennheiser EM 100 G2 wireless receiver is easy. First, you'll need to get a suitable power supply as it doesn't come with one. Connect the power supply to the receiver. Since it doesn't have antennas, you'll need to attach your own antennas for proper signal reception. When using it, always keep in mind the frequency range it operates in (518 - 554 MHz). Check your local laws about wireless frequencies before using it. As for maintenance, keep it in a dry and clean place. Don't expose it to extreme temperatures or humidity. If it gets dirty, use a soft, dry cloth to gently wipe it down. Regularly check the connections to make sure they're secure.