To be honest I was just expecting a heavy duty speaker suitable for not very careful teenagers. Waterproof was a bonus too. But this has so many features.
Bluetooth connection means you can connect your phone and answer calls through it, play music from other sources, skip tracks plus take it outside and have a good range.
It is a bit heavy but worth it for all its functions.
Poweradd Bluetooth Speaker, MusicFly 36W Wireless Speaker Bluetooth with 4 Driver, 24 Hours Playtime IPX7 Waterproof Enhanced Bass for iPhone, iPod, iPad, Samsung and More https://www.amazon.co.uk/dp/B07C1M52YW/ref=cm_sw_r_cp_apa_i_ZQQ9Cb33P5PHP