Car HUD display for OBD speed tracking and overspeed alarm1、Data Reading: The real time data output by the ECU can be read through the car OBD interface of the data cable, and it supports the nine major OBD protocols. 2、Stable Signal: The satellite signal data can be obtained through GPS and for Beidou satellite dual channel module, the dual signal is more stable. 3、HD Display: Clear at a glance, without lowering your head while driving, you can keep an eye on the dynamics of the vehicle at any time, greatly improves driving safety. 4、Functions: OBD vehicle speed, rotation speed, water temperature, voltage, altitude, roll angle, pitch angle, latitude and longitude, electronic clock, speeding alarm, starting on the vehicle, etc. 5、Light Source Sensor: Adjust the brightness of the screen by light, make use of color high definition LCD display with higher resolution. 6、Rotation: The working environment and technical indicators start with the car, and the automatic dormancy function when stopping, with a high degree of sensitivity.