Features:
GPS satellite speed measurement with full screen and large font
Speed alarm and fatigue driving alarm
Single driving mileage, time, and total mileage statistics
Car battery voltage display and local time display
Switchable speed unit (km/mile)
Made of durable ABS PC material with high temperature and corrosion resistance
GPS/Beidou dual-channel module for accurate and timely speed and direction data
GPS compass for accurate positioning and real-time display of data unaffected by geomagnetism
No built-in battery for safety under high temperatures
Automatic on and off with car start and stop
Automatic photosensitive adjustment for clear display in all lighting conditions
Speed calibration function to match car dashboard display
Satellite positioning speed of 1-3 minutes in open outdoor areas, no signal indoors (affected by cloudy and rainy days)
Operating temperature range of -30 to 80 degrees Celsius
Input voltage of DC12-24V and input current greater than 150mA

Specifications:
Weight: 8.0-Inch Screen: 193G (6.8 ounces), 9.0-Inch Screen: 209G (7.4 ounces)
Material: Abs Pc
Compatible with 12-24V Car Cigarette Lighter Power Supply
Gps/Beidou Dual-Channel Module
Automatic on and Off
Automatic Photosensitive Adjustment
Speed Calibration Function

Package Includes:
1 x 9 Inch Car Hud Gps Speedometer W / Compass Multifunction Display