Questions about a new monitor...

Here is the monitor in question: http://www.bestbuy.com/site/aoc-21-5-led-hd-monitor-black/4730904.p?skuId=4730904&ref=199&loc=8BacdVP0GFs&acampID=1&siteID=8BacdVP0GFs-_nOjtkqvqB5yngaYZaTzMQ

PCPartPicker says this monitor has freesync, but I cannot find anything about it on the product page. Does anyone know for sure if it has freesync?

Related to #1, does freesync cause the same input lag that v-sync does?

The monitor says it runs at 75 hz, but will it lower the resolution when its at 75 hz, or will it stay at 1080p?

Is this a good price for a freesync 1080p 75hz monitor?

If anyone owns this monitor, how high of quality is it? Is it worth purchasing

EDIT: My GPU does support freesync btw