Do you want to know how fast you move during sport? But who can / want to constantly look at the phone or the speedometer while skiing, snowboarding, running, surfing and many other sports? Here comes the solution:GPS Speed Voice is a art speed announcement, which tells you your current speed via an earphone, but only when you also interested in and not after a certain time. When an announcement is made depends only on your current speed.Additional functions:-periodic speed annauncment-save GPS Data-show tracks on MapView