Something which is worth just about nothing is the humble bluetooth speaker. Lions have long struggled with bluetooth speakers. There's a compromise between size, weight, & sound quality. The best one in lion opinion was the Auvio mini. It had the best compromises. Its mane problem was electronicals burning out. 1st its amplifier burned out & then it had some kind of firmware corruption.
The 808 Canz 2 had good sound quality but was a brick.
The best one now might be the Anker soundcore mini. Its sound quality is the worst & it's heavy, but it's the only thing currently made & it's just light enough. It has better bass but is very quiet & its passive radiator breaks after 3 years. It can be somewhat bodged with an extra op-amp & a lot of noise. It has the most user serviceable parts. The driver is screw mounted & removable.
The electronicals have mercifully remaned reasonably discrete & hackable. You can normally hack them to take external 5V & automatically power up.