I read the product comparison between the SB2 vs SB3. Seems like they are pretty much the same except the SB3 has a bigger,brigher display and two antennas. Other than those differences, both SB are practically the same.

Is this correct?

Also, I may buy a used SB2 but concern about the small display. The chair is about 11' away from the SB2. Is the display viewable from 11' away?

thanks,