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KDL-32L4000.has 2 HDMI ports, so any model Roku currently available can connect to it.
I would suggest getting one of the models supporting 4K resolution. They will provide you service should you upgrade to a 4K tv in the future, but will work fine on your current HD set.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X