SHIDU Portable Bluetooth Voice Amplifier IPX5 Waterproof Voice Amplifier 18W Loud Speaker 2500mAh Large Capacity Rechargeable Battery PA Systems Speaker for Teachers,Classroom, Meetings and Outdoors

Product is too much good But please manufacturing compact size like Ahuja

Literally no sound amplification. And amazon gives "Only Replacment" and no return. Pls don't even try....

Worth money. No issues even after few months of use.

Very effective, clear sound and awesome battery backup. Best for teachers

This amplifier is nicer than some in that the sound is a bit more bottom-heavy and less tinny sounding than some, without adding too much weight to get there. There is no feedback, even when the mic is fairly close to the amp. The volume controls are not intuitive but are easy to use -- the reverse (lower volume) and forward (increase volume) buttons act as volume controls. You also have to hold down a button for three seconds to turn the unit on and off. Once you learn the controls, the unit is pretty easy to use, though you might have to look at the amp to do it. A rolling dial is definitely easier to use, but this isn't bad. Just different. Pretty happy with it.