KOSO Speed Sensor for Tachometer/Odometer Tachometer/OdometerSIP, GPS Speed from space! This sensor allows our SIP odometer/tachometer to display road speed with satellite technology. Reliable and accurate with Global Positioning Satellites (GPS). Determining the real road speed of vintage scooters is more a matter of faith than judgment, since a reliable estimate with data provided by precise measuring instruments has been impossible, until now. Even with the most accurate of speedometers, factors such as tire circumference and unreliable speedometer worm drives and cables prevent this. More modern systems, such as our SIP tachometer / tachometer, allow you to determine the speed with the help of magnetic sensors. However, this solution still contains the problem of variations in the circumference of the tires. These also require the addition of a sensor on the steering column and a magnet on the front wheel. A simple and very accurate alternative is now available from KOSO, in the form of a GPS speed sensor for the SIP speedometer. This device allows you to map, record and analyze the route traveled on the scooter with the help of satellites orbiting the Earth. It contains absolutely no moving parts that can fail or wear out. The most advanced method to enable travel at the correct speed. The set includes a GPS sensor, a converter to interpret the signal for the speedometer display and all fixings etc. The GPS sensor itself is 40x50x14mm in size and requires careful mounting to ensure consistent reception of signals from the satellites above. Conclusion: The high-tech speed sensor for everyone who requires their exact speed on the road and/or does not require extra exotic components or wiring that ruins the front of their vintage scooter!