Actually I want the smallest Garmin, wahoo etc. that I can get, but still read. I have a Garmin Touring plus, but I don't use it for navigation. RWGPS on my Iphone has performed much better for me. What I want from a unit is basically what I am getting from my current use of my Garmin. Speed, mileage, riding time, grade, temperature, time of day and batter level. I just want it in a smaller size.