connecting smart TV to wireless headphones
If your smart TV has an "audio out" 3.5mm connection (looks like a black square with one hole in centre; just "audio out" not "digital audio out") and your headphones use RCA connectors (the red and white round old-fashioned ones like a stereo uses) you can just go to any electronics store and get a "3.5mm to RCA" cable/adaptor. I needed male to male but the store I went to only sold 3.5mm male to RCA female, so I also got a pair of RCA "plug couplers" (barrel connectors) that are female-to-female. Total cost: $20. Voila.