A:AnswerHi Quan, Thank you for your inquiry. Unfortunately, the X800H does not support HDMI 2.1 features. For the 4K 120 Hz feature, we recommend the X900H and Z8H models. Hope this helps! -Sam
A:AnswerHi Terry, Thank you for your inquiry! Unfortunately, the TV can't output sound from both the TV speakers and Headphones at the same time. To output sound from both the TV speakers and an audio device connect your audio device to the Digital Audio Out port. I hope this helps! -Carl
A:AnswerIt is supposedly compatible, but I would not bet on it. I found that Bluetooth is the HDTV's weakest area. After many attempts to connect my Klipsch speakers by Bluetooth I finally gave up and hooked them up through the headphone outlet. You may have to do the same. I would contact Sony support for additional information. They are working by chat not phone and do a good job.
