Phonak's Roger SF Touchscreen Mic teacher microphone is part of the Roger Soundfield BAS sound equalization system and is designed to improve audibility for teachers in classroom environments. The system is also ideal for work meetings and other pre-reading situations. The sound is transmitted wirelessly to the speaker and amplifies the voice so the teacher can be heard from anywhere in the classroom. Contributes to less vocal strain and a calmer sound environment. Multiple microphones can be connected and transmitted to the speaker system simultaneously if, for example, two or more teachers are teaching.