4 years & up. Fun-and-easy wireless microphone encourages even reluctant students to speak up! Just one button to record, then simply play back and listen (up to 4 hours of audio). Extended uses across the curriculum -- oral language, fluency, phonics, speech therapy, intervention, math facts, podcasts and more. Built-in USB to charge via your computer and download (PC, Mac). Upload student-created files (WAV or MP3) to digital portfolios for authentic assessment, or share with other educators or parents. Integrated speaker offers quality playback for instant self-assessment.