The document summarizes the technical specifications and features of the Sennheiser ENG 100 Series wireless microphone system. The system includes a choice of bodypack transmitters or plug-on transmitters that can connect to various clip-on or handheld microphones. Key features highlighted are long battery life, a wide switching bandwidth and frequency ranges for reliable audio transmission even in difficult conditions, and easy menu control options. Accessories and variants that can be chosen with different microphone options are also listed.