The Trevi EM 401 R wireless microphone is a microphone you're sure to appreciate. The maximum 20-metre range provides great flexibility when moving around. It is not only useful for singers, but also event organisers who may need to talk to a large audience. This microphone is popular for its high-quality technical design and very light weight. The Trevi EM 401 R has a range of 174 - 216MHz .