This Sennheiser ew 300 IEM G3 wireless IEM system operates in the 516 - 558 MHz range. It doesn't come with a power supply, batteries, or a transmitter antenna. The system includes an SR 300 IEM G3 wireless stereo transmitter and an EK 300 IEM G3 wireless bodypack receiver. Note that the antenna on the bodypack has an exposed area, but it still works fine. Before buying, check your country's wireless frequency regulations as some ranges may be illegal in certain countries.

Using this Sennheiser wireless IEM system is easy. First, make sure you have your own power supply and batteries. Connect the SR 300 IEM G3 transmitter to your audio source. Then, turn on the EK 300 IEM G3 bodypack receiver. Remember to check your country's wireless frequency laws before using it, as some frequencies might be illegal. Regarding the exposed antenna on the bodypack, it still functions well, but be a bit more careful around it. When it comes to maintenance, keep the system in a dry and clean place. After each use, turn off the devices and store them properly. Also, check the batteries regularly and replace them when needed.