WhisperPhone Duet Listening Center is an acoustical telephone that reinforces student-to-student and teacher-to-student reading activities. WhisperPhone comes with 2 handsets linked by an expandable voice tube up to 6 ft. WhisperPhone duet keeps classrooms peaceful by creating an acoustically-clear connection between two readers and also helps to develop reading skills. WhisperPhone duet is perfect for paired work, easy to integrate into exercises, Title l and Reading First qualified. WhisperPhone duet features great with reader's theater, battery free, one size fits all and is dishwasher safe.