A Roku Smart Soundbar? With it powered on, press and hold the reset button on the back for at least 30 seconds or more to do a factory reset. If its ONN Roku soundbar the remote willl just work, but if its a Roku branded Soundbar, you will have to pair the wifi remote to the sound first. After it stops bouncing, press and hold the pairing key in the battery compartment for at least 3 seconds and release, let it communicate and finish pairing. Ypou should now be able to pick the language and enter your internet network and password.