The speaker is first class in all areas: strength, sound quality, minimal distortion, etc.. It easily fills a large room with excellent sound, and is also very robust, waterproof and has great autonomy. A complete hit in my opinion.
When it comes to school classes and possibly a speaker as a playback companion for videos, the Bose Mini Soundlink II fits better (we tried both devices with a projector and a screen) and is more suitable (offers higher playback options) but is not as multifunctional.

super, thank you very much!