Questions about UE BOOM 2

It is possible that we purchase the colour variations at different prices from different suppliers so that we can offer some variations at a lower price.

The 3.5 mm input is an analogue input and expects levels as from a headphone output. This input is not suitable for a microphone.
Another possibility is to record something from the mobile phone with an app and then play it back via Bluetooth. However, you can only use this to make pre-planned announcements☺.

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