Features: 
100% Brand new and high quality!
Plug and play. It can automatically adapt to vehicle type.
Comprehensive display. It can display many parameters at the same time as follows‚ vehicle speed‚ engine speed‚ water temperature (voltage‚ throttle valve position‚ ignition advance angle‚ time of 100 km acceleration)‚fuel consumption‚ mileage‚ low fuel tips‚ engine failure.
Three display mode. Driver can chose normal display mode‚ high- speed display mode and automatic display mode.
Free switch. Km and mile can be switched freely.
Suitable size. The display area is 5.5 inches which is very clear for driver to read data.
Automatic power on and off. Starting with the vehicle starting‚ stopping with the vehicle stopping to protect the vehicle’s battery. Moreover‚ it can also power on and power off by manual‚ which is more easy to control itself. 
Flexible alarm mode. It can offer single-stage and four-stage overspeed alarm modes to choose to make driving safer.
Engine speed alarm. It contributes to shift gear in time to save fuel also has significance to new driver.
Flexible brightness adjustment. The brightness can be adjusted automatically or manually to reach the best state which is in harmony with the environment.

Specifications:
Environment temperature: -400C—+800C
Barometric press: 86—106 KPa
Relative humidity: 10%—95%
Environment voice: <=60 dB(A)
Alarm of sound level:> =30dB(A)
Work voltage: 9V~16Vdc(12Vdc/400mA)
Size of product: 150*85*14 mm

Package included:
1 x 5.5 Inch Car ELM327 Ordinary New Head Up Display MPH Speed Warning System
1 x User manual