PROMO CXAT X501C Multi Functional Smart Car OBD HUD Digital Meter Fault Code Alarm Display

CXAT X501C Multi Functional Smart Car OBD HUD Digital Meter Fault Code Alarm Display Please contact us before purchasing products. And tell us the car brand and date of production to make sure our products can support your cars. Usually our products can support  90%  car models after 2007 year. Please firstly confirm that you are awared of THE CUSTOM TAX you need to pay when products arrive at your country , since there are several examples that customers BLAME US that we let them pay high tax.  If we did something fake in the custom specification, we would be punished by Aliexpress and Chinese custom already!!!! Undertake OEM customization. Minimum volume: 500 PIECES. ​Speed meter indication error Speed Meter indicates speed and actual speed according to formula :  O ≤ Vn-VZ ≤ (V: + 10) + 4   V1- speed meter indicates speed in km/h;  V2- an actual speed in kilometers per hour (km/h).    The vehicle speed correction is based on 100km/h.  The error of the vehicle in the low speed state       is the reason why the original vehicle meter is not linearly displayed.  Specifically, you can connect to the OBD socket test with a dedicated instrument in the 4s shop.                   window.adminAccountId=233350470; . Brand Name: CXAT