A1 2.0 inch Car GPS HUD Head Up Display Vehicle-mounted Security System, Support Speed & Real Time & Altitude & Over Speed Alarm & Compass & MPH & Auto Sleeping & KM & Satellite Signal About the product This product is for drivers' safety, at high speeds, especially in high-speed driving at night, in order to avoid the driver to look down their head to watch the instrument, and decrease car accident. HUD is in extremely critical moment reflects its delicate care. HUD can project the important information displayed by the instrument (such as speed) onto the windshield, it can not only to help determine the speed of inexperienced novice to control their speed and avoid many of the speed limit road due to speeding violation. More importantly, it enables the driver instantly read the number in great vision and always make drivers eyes on the road in clear mind. Installation 1. For HUD: - Place HUD on the proper position of wind instrument panel, then plug car charger into the cigarette lighter inside, and connect HUD with the USB interface. - In the instant energized, the LED of the host will be fully lit, and then give out a "tick", the host back to sleeping mode, while the satellite signal icon starts blinking. Host automatically search the satellite signal status, after a few seconds,the host will search one satellite signal, the clock will be displayed in the host window. Upon receipt of a successful satellite positioning, satellite icon lights off, while the satellite signal strength indicator signal lights size. 2. For reflection film: Please stick the reflection film on the windscreen. 3. Please note: Do not use the reflective film before checking the HUD host installation location, to avoid wasting of reflection film. Features 1. Display information: Vehicle speed, real time, over speed alarm, compass, altitude, auto sleeping mode. 2. Above functions are projected on the windshield to remind driver to be safe. 3. Smart Display Function: After vehicle stop for 10s, HUD automatically switch to satellite time status, and when vehicle start, HUD automatically switch to the vehic