Bluetooth speaker to stay always connected to energy

Hello there,

I hope the title is comprehensible, since I’m not a native speaker.

I want a bluetooth speaker to stay always connected on power, my two current options are the Harman Kardon Aura Studio 2 and the Marshall Acton.

Are there more options? I accept options from low budget to more expensive ones, just in case I find the product and feel tempted to get it.

I want a single device speaker, because the place for it isn’t big and I’m tired of so many wires.

My budget is something like U$ 300,00 (converting from reais).