Review on 🎤 18W Waterproof Wireless Voice Amplifier Bluetooth Teacher Microphone - Portable Voice Enhancer Headset Mic, Rechargeable & Ideal for Classroom and Outdoor Use by Jared Coleman

Stops working after turning the volume all the way up. No connection to speaker. I called and discussed the connection details and attempted to resolve the issue with Revain customer service. You are excellent. I bought and returned 3 sets and they all did the same thing. I have one and it is now 90 days old and they do not take it back. So a bit disappointed with this product.