X6 3Inch Car HUD Head Up Display OBD2 II Universal Overspeed Warning System Projector Windshield Auto Electronic Voltage AlarmItem Type: Alarm Systems & Security Item Height: 1. 2cm External Testing Certification: CCC Item Width: 5. 4cm Model Name: X6 HUD Head Up Display Item Length: 9cm Item Weight: 0. 271kg Brand Name: roadbuf Material Type: ABS Special Features: Universal HUD Head Up Display Voltage: 12V Item Type: Alarm Systems & Security Type: Portable Screen Size: 3 inch Working voltage: DC9 16V Alarm sound level: more than 30db Working Environment: 40 +80C atmospheric