Car HUD Head Up Display Dial meters With MPH KMH Speed Alertigue Driving Alarm 4.5 Inch LED Screen

body { font-size: 100%; color: #000; font-family: Open Sans,Arial,Heetica,sans-senif,SimSun,"宋体"; line-height: 1.3; } dl { margin: 0px; width: 480px; float: left; } dt { width: 100px; height: 15px; float: left; } dd { width: 240px; height: 15px; float: left; } dl dt { margin: 0px; line-height: 22px; color: #474747; font-size: 14px; font-family: tahoma; } #product-desc { width: 100%; height: 209px; } #descrtion { width: 100%; height: 50%; } #details { width: 100%; height: 50%; } .ui-box-title { height: 30px; font-size: 15px; font-family: tahoma; font-weight: bold; background-color: #ddd; text-anchor: inherit; padding-top: 8px; margin: 0px; } .ui-box-body { margin: 0px; } #tbspecifics { border-right: 1px solid black; border-bottom: 1px solid black; } #tbspecifics tr { height: 30px; } #tbspecifics td { width: 100px; border-left: 1px solid black; border-top: 1px solid black; } [ meters] Quickly collect meters from s, and the s can be locked in real time. More accurate than HUD , hud has the same working logic as speed . It has 100% versatility for all vehicles including cars, kup trucks, off-road vehicles, trucks, ins, scooters, motorcycles, bicycles and boats.[ HUD display]Driving Speed, Single Driving Time and Mileage. When using it in a car, plug it into the car's USB port. If there is no USB port in the car, you need a car adapter or plug it into a (not included).[Over-Speed Alarm] The default setting of vehicle speed is 120KM/H. When over-speed alarm is active, it will beep in 3 times to alert the car driver. Just need pre the "up" or "down" to adjust it. If want to off speed warning, just adjust the over-speed value to a very impoible high value.[Accuracy] As usual, it's 2-5 KM/H off from the car engine speed. The display speed could be calibrated by hand easily. e it 2-5 miles ahead to avoid speed ticket.[Easy to use]Simple installation, plug and play, powered by the arette of the vehicle. No profeional installation required. No need to connect VSS (vehicle speed signal), it can be used in 5 minutes.colour: blackMaterial: plasticPackage Contents:1 x Car HUD Head Up Display1 x MountOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.