Features: Plug and Play: After connecting to the power supply, it can work directly without any other operation 10Hz Refresh: No jumping speed, the display is more coherent and smooth GPS+Beidou Dual Chip: Very accurate speed measurement, fast speed refresh Large screen display: big font, multiple functions; Auto Dimming: Clearly visible day and night Speed unit: KM/H and MPH can be changed freely<br><br>Function: 1: Speed icon 2: Speed unit KM / H km unit MPH mile unit 3: Speed 4: Satellite icon: search the satellite after the stop flashing, can be used normally, (N) north , (E) east , (W) west, (S) south. 5: Multi-function display: Time driving, Time driving distance, Altitude 6: Atmosphere decorative lights 7: Driving distance icon 8: Elevation icon 9: Driving time icon Material: plastic colour: As shown<br><br>Package Contents: 1 x Heads up display