Race buddy helps you to measure acceleration from a standstill or while you are rolling. It has the ability to record video and overlay all your data (speed, temperature, G-force, the difference in altitude, etc) over your video and you can share it with your friends. It requires a RaceBuddyONE high-precision GPS device. We also supported external Bluetooth devices from another manufactures for PRO users: RaceHF Bean, Racelogic VBox Sport, Dragy, and RaceBox.cc