ZOWEETEK Voice Amplifier Microphone Headset 4 Teachers, Original Personal Voice Amplifier, Work of 12 hrs, Portable Speaker 4 Classroom, Speech, Tour Guide,Support MP3 4mat Audio,Power Amplifier

A True Original Voice Amplifier that amplifies your voice without making it mechanized in sound quality ZOWEETEK Voice Amplifier for Teachers is the perfect companion for educators.Enjoy the freedom of expressing yourself confidently, without the fear of your voice getting lost in the crowd Amplifys your voice and saves your throat. The sound is clear and no distortion. The max 10 watts sound can cover about 10000 sq. ft (1000 ㎡), loud enough to cover a big room Rechargeable voice amplifier：Built-in 1800mAh Lithium battery, amplifying time is up to 12 hours. Music playing time is up to 10 hours. Only need 3~5 hours to be fully charged Multifunctional Microphone amplifier：Supports TF (Micro SD) card playing, USB flash drive playing and 3.5mm AUX audio input (Mic port can be used as AUX port). You can repeat single tune, loop all music and switch songs