This device answers the basics - how fast did I go, and how high did I fly? Operation is simple with single button control. This is the Version 3 of the popular GPS logger. It has an improved it with a newer processor which is both lighter and will give more accurate results than the original version. Additionally, the altitude can be reported in feet or meters. What is great is unlike the V2 version, when power is removed, the internal memory saves the last 5 tracks.