Review on 🔊 Wireless Bluetooth Waterproof Voice Amplifier with Speaker - Small Personal Microphone for Teachers and Outdoors by Danny Nedumaran

I would give this amp a 4.5 if possible. Sometimes the sound disappears, but there are no particular complaints. I've found that the system works best when the microphone is turned on first, then the speaker. The battery life on the speaker is about 6 hours, but only about 2 hours on the microphone.