The picture above is very OLD! Not sure how this thread woke up again!
I'm currently working furiously for the first F1 customer, aka Mandy/Martin/Kirk for the PFI 2005 Cayman event. They will receive the first one or two F1's (if all goes well) on April 2. The plan is to mount one of the F1's on the sled cam so you can watch the F1 readings, during the whole descent on the sled. If I'm able to build two working gauges by then, the second would be worn on the diver's wrist.
The surface interval (of course) shows you minutes and seconds. You can select from several surface interval display modes. There is a simple mode which simply displays your previous dive depth/time, as well as your current surface interval. Or, you can enable the more advanced surface interval display, which will cycle between your various peak velocities, descent/ascent times, thermocline information, halocline information (salinity-changes at depth), etc... I'm considering a 3rd surface interval display mode which cycles through the graphs of your dive (depth graph, velocity graph, temperature graph, salinity graph, etc...)
When programming the alarms, you can select the waveform of the beep(s) on each event. This allows you to make alarms which sound very different, in addition to having differing number of beeps based on the conditions of your choice. You can get an audible velocity indication by setting beeps every 0.25m, 0.5m or 1.0m, so the frequency of beeps tells you your speed, in case you can't look at the gauge to see your actual numeric velocity.