I've found that 3 working days is about what it usually takes for something to land after they get the order.
You can remove the single screw at the end and change from F to C AND to add a bit more accuracy--
Attachment 330816
As far as the 58' or 85' the F or C is always on the top hand corner in the display screen.
I think you will really enjoy this new tool. I know I do, in fact, all three of my kids get one for their birthdays this year.