The Sennheiser SKM AVX 835 Handheld Microphone Transmitter (1880-1900MHZ) for the AVX system and features self configuring digital transmission which eliminates time-consuming radio frequency setup. The AVX matches perfectly to your camera's input sensitivity without having to adjust the audio level on the microphone. Designed in collaboration with creative professionals for film and electronic news gathering (ENG) applications, the Sennheiser SKM AVX 835 Handheld Microphone Transmitter (1880-1900MHZ) 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 unauthorised interception.