This Sennheiser EM 300 G2 wireless receiver operates in the 626 - 662 MHz range. Note that it doesn't come with a power supply. Due to its frequency range, it's not legal for use in the U.S. Always check your country's wireless frequency regulations before buying. This unit has only been power - tested and includes an antenna.

Using this Sennheiser EM 300 G2 wireless receiver is straightforward. First, make sure you have a suitable power supply as it's not included. Then, connect the antenna to enhance the signal. Before you start using it, check your country's wireless frequency laws because this receiver may not be legal for use in some places, like the U.S. When it comes to maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you encounter any issues, only perform basic power - testing as more complex repairs should be done by a professional.