I have the Garmin 810 and it sends her an email to her phone and computer. She can then check where I am and if I am progressing. I typically tell her where I am going and she generally knows how fast I ride and how long it should take me. She is not in general a worrier, but on occasion if I add a little distance, she might text me to ask how much longer I will be or if I am on my way back. She has only been "worried" once when I was going out for about 3 hrs and end up being out for 5.