QianBao Head-Up Display displays driving data on the front windshield such as speed on the car front window, avoiding driver's unsafe driving cause by looking down to the instrument while driving. Question: How do I adjust speed.it is exactly 5 mph faster then speedometer Answer: There are setting buttons on the side of the head up display. First, you can vertically press for 5 seconds to enter the setting item. Second, up or down the wave button to adjustment the speed. Third, vertically press 5 seconds to submit and exit. Question: How accurate is it can i use it in place of a broken spedometer Answer: It is pretty accurate most of the time. I bought it to replace my speedometer. at lower speeds or in tunnels it can read incorrectly. Question: Do you have to tell it mph every time you turn or vehicle and do you have to unplug it every time? Answer: It will record the settings of your last use. You do not need to make it to mph every time. What’s in the box: 1 X HUD Module, 3.5 inch screen 1 x Cigarette Power Line 1 x Reflective Film 1 x Anti-slip Pad 1 x Sun Shade Pedestal 1 x User Manual in English Features: Ultra-clear, digital pop-up screen project on windshield 3.5” multi-color LED display, more abundant and easier to read →Dual core processor chip for real-time data Rich content: speed, GPS compass, speed alarmIntegrated light sensors for automatic image balance Two mode, concise and standard, simple and elegant Automatic sync, power on/off with engine ignition Automatic / Manual brightness adjustment mode Technology Parameter: Vehicle Compatibility—All cars Working Voltage — DC 8V~18V Working Current: 40mA Sleeping Current — 15mA Compass Precision — ±1° Speed Range —0~400km/h / 248.5 MPH Satellite Positioning Time
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