This Sennheiser EM 100 G3 wireless receiver operates in the B range of 626 - 668 MHz. Note that due to the frequency range, it's not legal for use in the U.S. Always check your country's wireless frequency laws before buying. Different countries may have illegal frequency ranges. Also, this unit doesn't come with antennas but includes a correct power supply.

Using this Sennheiser EM 100 G3 wireless receiver is easy. First, connect the correct power supply that comes with it. Before you start using it, make sure to check your country's wireless frequency laws as some frequency ranges might be illegal in your area. This receiver doesn't have antennas, so you'll need to get them separately if you need them. To keep it in good condition, avoid exposing it to extreme temperatures and moisture. Regularly clean the exterior with a soft, dry cloth. If you have any issues, refer to the manufacturer's support.