The Format 4 is our modernized version of our ground-breaking, immensely popular Format 2 model.  This is a wrist-instrument with combined analog and digital display with unmatched ease of use. The clean dial displays the time at a glance, in any light conditions, without the need to press any buttons. The backlit, dual digital readouts provide every essential sports-timing function (day/date– chime – alarm – chronograph – countdown timer – dual time).

Here is a size comparison of the F4 to the F2.

A review of the Format 4 can be found on watchreport.com here.