Designed in collaboration with creative professionals for film and electronic news gathering (ENG) applications, the Sennheiser SKM AVX-835S Digital Handheld Microphone Transmitter features an innovative digital design that is fully self-configuring which makes setup fast and easy. The system's link protection helps ensure reliable audio transmission and the AES 256 encryption helps protect your signal from unauthorized interception. The handheld transmitter comes with a dynamic microphone capsule with a sensitivity of 2.1 mV/Pa, a cardioid pickup pattern, and a maximum SPL of 154 dB. The mic also features a mute switch for your convenience