DC5-24V Car Speedometer Projector Head-up Display Security Alarm 4.7 inch Screen Temperature Speedometer Gauge GPS Tracker HUD Multi-functional Accessories Feature: 1. Display: Speed display, up to 999Km/h; The metric/mile unit can be switched by pressing the key. For overspeed alarm, 40-200Km/h alarm can be set. Press the key to adjust it step by step in 5km/h. The default alarm is 90km/h when the machine is turned on, and the data is saved when the machine is turned off. 2. Mileage display: Total mileage display, which can display 9999Km accumulatively, will be saved after power failure, and can be reset and switched to mile unit by pressing the key. Single mileage and altitude switch display. Single mileage can be stored 999999Km accumulatively. It will be saved after power failure. It can be reset by pressing the key (it can be switched to mile unit). After GPS positioning, the altitude unit will be displayed in meters, and the display will be switched at 15s intervals. 3. Display of temperature/humidity/date/voltage: Display of ambient temperature, which can be switched between Celsius and Fahrenheit units by pressing the key; Air humidity display; Date display, MM/DD/YY (the display will be accurate after GPS positioning), and the display will switch to voltage display for 10s; Voltage display, alternating with the date for 10s. 4. Time zone setting: Set the time zone by pressing the key; After pressing the key to enter the time zone, the eastern eighth zone (Beijing time) will be displayed by default. After entering the time zone, it needs to be adjusted to 09:00. It will be automatically saved after 3s, and it will be saved after power failure. 5. Screen brightness: With light sensing screen brightness, the adaptive brightness can be turned on or off by pressing the key. The factory default is adaptive, and the last setting can be saved after power failure. Specification: Origin: Mainland ChinaMaterial: ABSColor: BlackOperating voltage: DC5-24VScreen size: 4.7 inchesOperating current: 66mA@12V, 147mA@5.2VOperating temperature: - 40 - 80 Refresh rate: 10HzCold start time: 1MinWarm start time: 1-5sSensitivity: -166dBmIP: IP65Size: 124.6x95.3x17.7mm/4.91x3.75x0.7in Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement. 1 X GPS Speedometer 1 X USB Cable 1 X Double-Sided Adhesive Tape 1 X Instruction