Looking for tachometer with gps
 

Hello everybody!
I'm looking for a tachometer with gps because I'm sick of fetching my cell phone every time I want to know where I am... Does anyone know a good solution where tachometer and gps are combined? That would be ideal. I've already been searching at chrono24, but I didn't find anything of that kind.
Can anybody help?
Thx, Aqua