Interesting observation this morning - the head on Redbird has been turned off for about 7 days (snow and ice kept me on 4 wheels). This morning when I powered it on, I immediately got a reading from the rear tire (not what it was when it went off because riding increases the PSI). As I backed the ST1100 out of the garage, I got a reading on the front tire. So that's not instantaneous on the front, but pretty close! ;-) When I got into the office, instead of turning the head off, I just removed it and stuck in my left saddlebag, taking note of the pressures (39,44). I'll see what it says when I leave this afternoon, as the tires should be cold and back down at the 'normal' pressures. FWIW, when you look at the FOBO unit without the group buy price, add in the price of waterproof case and mount for your phone, you are pretty close the Hawkshead price. The group buy really was a great deal!