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18W Wireless Bluetooth Waterproof Voice Amplifier Portable Headset Microphone with Speaker Small Personal Microphone for Teachers, Outdoors electronics_new_releases_Aug2023 Lifespan 10x longer than other18W Wireless Bluetooth Waterproof Voice Amplifier Portable Headset Microphone with Speaker Small Personal Microphone for Teachers, Outdoors Product Features POWERFUL Microphone and Speaker: The portable voice amplifier comes with a WIRELESS headset microphone. UHF wireless transmission technology, 15m 50ft stable wireless connection at open area. The uhf wireless voice amplifier gives you complete freedom to walk around the room. Super 18W output,