Smart Vision Onboard OBD2+GPS 

OBD and GPS Gauge are suitable for all cars and can be installed on pillar trim or dashboard.
Can be wired or wireless.
Size: 61x49mm
Output Frequency: ACE S1 OBD2 HUD Car GPS Head-Up Display
Power: 11V~18Vdc (12Vdc/200mA)
Included functions are RPM and fuel consumption.

Available from powerfastwheels.com