Because It will rise beep beep voice for couple seconds when over the speed that you had set (default speed: 150km/h) Description: 1.Environment temperature: - 40 °C- +120 °C Barometric press: 86-106KPa Relative humidity:10%-95% Environment voice:<60dB 2.Work voltage:11V~18Vdc(12Vdc/200mA) 3.Sleep current:<30mA 4.Display way:Virtual image reflection 5.Display channel :LED Display 6.Reflector transmittance: 98% Package Included: 1 x HUD 1 x Cable for OBD 1 x Cable for GPS 1 x Reflective Film 1 x 3M Stickers 1 x English User Manua COMPATIBLE ATTENTION: OBDll only be available for vehicles produced after 2008. GPS MODEL Perfect Suitable for All Vehicle. Dual System, Change free. WHAT's the Difference Between GPS and OBDII? 1. GPS works for all vehicles, but it doesn't show as much data as OBDII. 2. OBDII has more powerful features and data, but is only suitable for vehicles produced after 2008. Conversion between GPS and OBDII： 1.GPS system: after power on, GPS light flickers, press "＋" button within 5 seconds to switch OBD system 2.OBD system: after power on, OBD light flickers, press "＋" button within 5 seconds to switch GPS system ATTENTION: 1.Please tear off the protective film before using this product, otherwise it will affect the clarity of the projection(If it is in direct sunlight, the clarity will be a little weak, after all, this is LED display on transparent glass). 2.Because the car's glass is double glazed, the device will have slight ghosting, but it will not affect the use. If the reflective film (contained in the package) is used, the slight ghosting will not occur. 3.If you are plugging OBD cable, please adjust the voltage to 12.8. If you use GPS mode, you can plug cigarette lighter with USB cable
- 🚙【What is HUD?】It displays driving data on the front windshield such as speed,RPM,water temperature,voltage single mileage,compass,digital clock,etc.The digital clock can always be displayed on the device, no matter which function you use, and the HUD avoids the danger of the driver looking down at the dashboard, which ensures the driver's safety and helps the driver stay in top condition.Zero double images, clearly reflection on the windshield,it is pretty clear in the sunny day,rainy day.
- 🚙【Button Function】With the button function,you can easily set up and switch various functions you need.There are two USB ports,you can choose one according to your needs(Note:only one interface needs to be connected.Plugging in two ports at the same time could burn out your car.).Ambient decorative lighting,Engine RPM,Fault code alarm,Fatigue driving alarm.function:speed,water temperature,battery voltage,driving distance,Water temperature icon,compass,digital clock.
- 🚙【Simple Display】Vehicle Speed+Engine RPM,HD Display,practical function,let you drive more comfortable for a long time.(plug and play--Available for 95% car with an OBD2/ GPS interface) The Nano-Technology - High clearness projector, to eliminate unwanted reflections and can make the display information more sharper.The radians displayed above the data are colored,which makes the projection even more cool.The Automatic and manual brightness adjustment mode, and more easy to control the HUD.
- 🚙【Plug & play Easy to Install】This unit has equipped with 2 cables:OBD2 and USB cable.We do not need to damage your car but just plug them in,then you can use it and modify your car.OBD2 mode is only applicable to most vehicles manufactured after 2008(if you want to use OBD2 mode,please check whether your vehicle has OBD2 protocol or contact us for confirmation before purchase).The GPS mode is perfect for all vehicles.(if your car is not OBD compatible,use GPS mode.)Dual System,Change free.
- 🚙【QUALITY SERVICE】CE FCC RoHS Certification, Superior quality. The chip with powerful performance and compatibility to make sure dual system, dual-run memory and dual-core processor high-speed operat.If you have any questions about this product, please feel free to contact us. We will get back to you as soon as possible and help you solve the problem.