GPS Speedometer Head Up Digital Display w/ OBDII DataKeep your eyes on the road and read all the important driving info, such as speed, from a head up display reflected off the windscreen. At the touch of the built in scroll button, you can switch between GPS and OBD II modes. In GPS mode, the display will show your speed, battery voltage, and the number of connected satellites. Switch over to OBD II mode to display speed, engine RPM, water temperature, battery voltage, and distance traveled. The main