GiecyVoice Amplifier, Giecy 30W 2800mAh Rechargeable Personal Voice Amplifier with Microphone Headset, Portable Speaker for Multiple Locations Classroom, Meetings and Outdoors (G300-Red)

Giecy Voice Amplifier, Giecy 30W 2800mAh Rechargeable Personal Voice Amplifier with Microphone Headset, Portable Speaker for Multiple Locations Classroom, Meetings and Outdoors (G300-Red)

ZOWEETEK ZW-Z258 Portable Rechargeable Mini Voice Amplifier for Teachers with wired Microphone Headset and Waistband,Supports MP3 Format Audio for Speech, Class, Training,Tour Guide,Power Amplifiers

WinBridge Wireless Voice Amplifier for Teachers with Bluetooth Headset Microphone and Waistand, Bluetooth Voice Amplifier, Portable Meagaphone Speaker Mic, Back to Shool Supplies, 15W|1500mAh WB002