This translates to Vertical Refresh Rate between the range of 50 hz and 76 hz depending on your monitor's resolution.
On that particular monitor, the horizontal refresh rate has a range of 30 hz to 83 hz.
I checked an amazon customer reviews and found one user was happy with this set up:
* HDMI: 1
* 1920 x 1080
* 68 KHz, 60 Hz
Basically he is using the recommended resolution, 1920 x 1080, and at that resolution the monitor supports the refresh rate of 60 Hz.
On Windows 7 you can explore this yourself by right clicking a blank area of the desktop > Select Screen Resolution from menu > Right Click the first monitor (1) > Select Properties from menu > Select the "Monitor" tab > Notice the "Screen refresh rate" under Monitor Settings. This is what refresh rate your monitor is currently set at.