ResponseBridge
ResponseBridge Bluetooth Voice Amplifier with Microphone Wireless Headset, 25W Loudly Personal Handsfree Portable Microphone with Speaker, Echo Amp Small Pa System for Teachers Classroom Coaches ect
HW HAOWORKS
Portable Mini Bluetooth PA System with Wireless Headset Microphone 30W Personal Pa Speaker Rechargeable Voice Amplifier Supports Echo/FM Radio/AUX-in Mode/USB Input/TF Card
HW HAOWORKS
Wireless Voice Amplifier Bluetooth Teacher Microphone 18W Waterproof Portable Voice Amplifier Headset Mic Rechargeable Voice Enhancer Personal Microphone for Classroom Outdoors