I9 HUD Head Up Display OBD2 Proiettore Velocità Auto Tachimetro Rilevatore Auto Allarme
HUD installation. 4,connect the other side of OBD2 cable with HUD ,and then start the engine;. 2,put HUD on non-slip mat;. 3,connect OBD cable with car OBD2 interface;. 5,stick the reflection on windshield.