A high precision GPS wireless digital speedometer, designed to be a true speed indicator, with a 22 hour battery life, making it perfect for all day use.The unit features 4 digit display an accurate GPS speed and the colour of the display changes between green or orange depending on the state of GPS reception (The unit will only display speeds once the vehicle travels above 5 km/h or 5mph).The GPS Digital wireless speedometer has a reception indicator for GPS Satellites. Beyond three bars, reception is good. When the device is searching for a signal a single bar scans from left to right. This indication directly affects the speed measurement precision, the more bars you can see the more reliable the reading. When the battery is low the indicator will flash to show the state of low power. A USB car charger is included with the device.This GPS Speedo is supplied with a windscreen suction holder in order for you to mount the speedometer inside the screen, it can also be attached with self