Vocal Ten is a Voice Amplifier for teachers, professors or TAs. While some lecture halls are equipped with PA systems, many smaller classrooms lacks such systems, and it is even less likely if a lesson or lecture was to venture outside or to another venue.
 
Using a voice amplifier like Vocal Ten, the teacher speaks into the microphone worn over the ear, and his/her voice will be amplified from the speakerbox clipped to user's waist or placed on top of any surface. A powerful 10 watt output allows user's voice to be amplified outwards up to 10,000 square feet. Lengthy battery allows up to 9 hours per charge, and the microphone reception from the speaker box is up to 30m, so the teacher can place the speaker unit at the back of a classroom for even better voice coverage.