EarFun UBOOM L portable bluetooth speaker. It is IP67 dustproof and waterproof even though it has a little tear at USB-C and Jack 3.5mm cover, works well.
Speaker also got its own memory, You can update software of speaker to get bugfixes and even change in equalizer (I never used Earfun app, I had no need). I'm selling this speaker because I have currently 3 of other brands and taking all of them hurts my back.