I regularly use Bluetooth wireless earbuds with my Roku Ultra 4800, so I'd say yes, you should be able to connect a Bluetooth speaker. I don't know how many simultaneous Bluetooth connections it can sustain. My guess is one.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X
