Alienware 25 Gaming Monitor: AW2518HF

Hi guys, do any1 knows where can i find the freesync limit range for this monitor?

http://www.dell.com/en-us/shop/alienware-25-gaming-monitor-aw2518hf/apd/210-amst/monitors-monitor-accessories

And one more thing: do you guys think that the 1920x1080p res is the ideal for a 24 inch monitor? I'm willing to buy this guy but i'm worried about the res, it's kinda "old" for today standards

Please help me understand it better, thanks