Does uboom L auto shutdown on wired mode

Basically the title. I need to know whether the earfun uboom L can run on wired mode without automatically shutting down? I want to take my crap office laptop around and have the uboom L lying around but all Bluetooth speakers in my experience just shut down without any audio playing after a while.

Also what's the tiniest speaker I can buy which has a wired mode which doesnt have auto shutdown?