Photo 1 of SHIDU Bluetooth Voice Amplifier,Portable Waterproof Voice Amplifier with Wired Microphone Headset 18W 4400mAh, Rechargeable Bluetooth Microphone and Speaker for Teachers,Outdoors,Classroom,Fitness

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Photo 1 of SHIDU Bluetooth Voice Amplifier,Portable Waterproof Voice Amplifier with Wired Microphone Headset 18W 4400mAh, Rechargeable Bluetooth Microphone and Speaker for Teachers,Outdoors,Classroom,Fitness Photo 2 of SHIDU Bluetooth Voice Amplifier,Portable Waterproof Voice Amplifier with Wired Microphone Headset 18W 4400mAh, Rechargeable Bluetooth Microphone and Speaker for Teachers,Outdoors,Classroom,Fitness