A:AnswerIts not on the G-SYNC compatible certified list, but it will still work with G-SYNC, however I wouldnt recommend using any type of sync because it adds input lag (not a lot but more lag is more lag), thats just my preference though.
A:AnswerIt does not, but it does have adaptive sync. If youre into that type of technology I would recommend getting the ASUS TUF Gaming VG27AQ or ASUS TUF Gaming VG27BQ. They are both 1440p at 165hz (overclocked), but the first one is an IPS panel, so it will have great colors, while the other one has worse, but not bad, colors with a 0.4 advertised pixel response time (which is not real.) Nonetheless they are both great monitors so and both have ELMB sync.
A:AnswerIf youre referring to the refresh rate of the monitor, it refreshes at 240hz. This can only be achieved using display port 1.4. If you use hdmi 2.0, you can only run the monitor at 2k 144hz.
A:AnswerIm not sure about the blue light, there might be a blue light filter, but it is definitely not flicker free. It uses Pulse-Width Modulation which could cause eye strain.