Giecy Portable Voice Amplifier with Headset Microphone 30W Rechargeable Battery 2800mAh Powerful Sound System for Teachers, Guides, Coaches, Presenters

Giecy Portable Voice Amplifier with Headset Microphone 30W Rechargeable Battery 2800mAh Powerful Sound System for Teachers, Guides, Coaches, Presenters

NORWII Voice Amplifier S358 Portable Rechargeable 2000mAh with Wired Microphone Headset & Waistband, Personal Microphone and Speaker for Teachers and Tour Guides, Black

zdyCGTime 3.5mm Audio Male to Portable Headworn Microphone for Mic System,Voice Amplifier,Speakers,Teachers, conferences, speeches, Drama Performances, Tour Guides.(2pack-1M)