Majority of Roku tv's come with IR remotes, nothing to pair, just try it. There are two code sets use by roku tv's, The Hisense will respond to both code sets, I have no idea what the sanyo responds to, if its the same as the Hisense, or if it's the other one. Or both. If its the only the other code set then the hisense remote won't work. As I said try it.
And if your hisense does come with wifi remote with pairing key, yes it can be paired to sanyo, it can not be paired to two tv at the same time. To pair, unplkug the power of the sanyo for few seconds, then plug it back in and start pressing and holding the pairing key in the battery compartment, when roku stops bouncing on the tv stop pressing for a bit and start again until you get confirmation its paired.
Edmund
Roku Community Streaming Expert
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