ZORBES® Voice Amplifier Microphone Headset Set 2200 mAh,Support TF Card/Flash Drive,with Strap Belt, Portable Voice Amplifier for Teachers

Zorbes® Voice Amplifier Microphone Headset Set 1800 mAh, USB Rechargeable Support TF Card/Flash Drive, with Strap Belt, Portable Voice Amplifier for Teachers, Classroom, Meetings, Yoga, Tour Guides

DIGIMORE Voice Amplifier for Teachers with Bluetooth | 8 Hrs Battery | Wired Headset Mic with 10W Speaker for Tour Guides,Yoga,Classroom Teaching Aid for Schools & Colleges (D-1200)

ZORBES® Voice Amplifier for Teachers - Microphone Headset Set 2200 mAh, with Headset Microphone Support TF Card/U Flash Disk, Portable Voice Amplifier for Teachers, Tour Guide, Coach, Speaker (Black)