Review on Portable Voice Amplifier with Wired Headset Microphone Speaker - Louder Sound with Mask On, 18W 4400mAh, Bluetooth Support, Waterproof for Outdoor Activities, Teachers, Tour Guides - Whisper M800 by Jennifer Johnson

I am a Personal Development Coach and find this very useful for my workshops, mini class announcements and small stage performances. Have used it successfully for lectures. The size of the speaker is smaller than a portable speaker system, the sound quality is good, there are some feedback problems at first. but it will be ok once you get used to it. Students can hear easily and clearly. I would recommend this voice enhancer to anyone trying to speak on stage for the first time as well as general trainers in the classroom.