RYSJM | M22 GPS Car HUD Head Up Display Digital Large Font Speedometer with Compass Time Display And Overspeed Alarm for All Vehicles

M22 Function:Vehicle speed, progress bar, clock, single travel time, single travel mileage, compassAlarm: overspeed warning, fatigue driving reminderM22 Specification:Wire or Wireless: WiredSize Name: 95x50x30mm/3.74x1.97x1.18inchMaterial: PC+ABSScreen type: LEDScreen Size: 3.5 inchSpecial reminder:The working voltage of this product is 5V, and it is forbidden to use a voltage higher than 5V for power supply. After the power is turned on, the compass icon flashes to indicate star search, and it can be used normally only after the icon stops flashing and is always on.Package:1X host1XUSB line1X reflective film1X anti slip pad1X instruction manual