All roku sells are Wifi remotes for roku tv's, you would use your phone to put it into pairing mode, then press and hold pairing key in the battery compartment of the new remote. Its about $27. with tax and shipping. Or you could go to ebay, there are million Sharp Roku tv IR remote for about $10.
I have a Roku T.V. well I broke the remote for it by accident So I went and brought a new one I have tried several times even changing the batters in and out and it still wont link to my Roku T.V. why is this ?
Please contact your TV's manufacturer directly to report this issue and request additional support. Each Roku TV manufacturer provides direct support and warranty services for their products running the Roku OS.