Universal Car Head-up Display GPS for Smart Multifunction Alarm Meter Speedometer Speeding Gauge Digital Overspeed Warning Y9RCbrand new and high qualityFeatures:Please disconnect the HUD if you donfor t drive for more than a week.Generally speaking car batterys standby for time is 1 month,we kindly suggest you to unplug the OBD device when the car is not used for a long for time due to different vehicle conditions.Main Function:1.Multifunction: Speed, Water temperature, Voltage2.Engine icon, Water temperature icon3.Voltage icon, Fatigue driving icon4.Light sensor:HUD can automatically adjust the brightness according to the environment5.Speed unit: MPH- mile,for KM/H- kilometerspecification:Color:BLACKMaterial:ABSSize: 8.6*3.7*1.6cmQuantity:1PCNote:Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes:1x for Head Up Display