In addition to the Go Mic Mobile® (GMM) Receiver, the uniquely configured Go Mic Mobile® Handheld Wireless System features Samson's HXD2 Handheld Transmitter with Q8 Professional Dynamic Microphone capsule for up to 100' of uncompressed digital wireless operation. The HXD2 also offers AGC (auto gain control) and internal limiting to ensure you always have the clearest audio signal possible.