I got the GPS Mouse ordered because my Galaxy S2 in overcast conditions quickly became inaccurate in the forest or the GPS service even refused altogether. Doof geocaching! In addition, the price is very good! Well, what can I say. Fantastic !!! Ruck Zuck is a signal there and the location is very accurate no matter where and in which weather. What is even more important to have a power supply is not included. Only one car charger is included.