Features: Enhances your vehicle's performances with the 2" 52mm Digital map Speedometer, featuring a high resolution large screen and built in map antenna for precise real time speed, trip, and odometer tracking with ±1km/h accuracy across cars, boats, and motorcycles. Designed for 12V/24V systems, this hard stainless steel gauge operates in extreme temperatures ( 20°C to 70°C) while maintaining low power consumption (≤100mA), with automatic data preservation for accumulated mileage and unit switching via yellow wire control. Ideal for automotive enthusiasts, marine operators, and motorcycle riders requiring stable speed monitoring and map based navigation data including coordinates, height , and directional orientation during journeys. Perfect for city commutes, off road adventures, marine navigation, or racing scenarios where fast access to /km/h units and trip measures ensures safe, informed operate across diverse terrains and vehicles. The waterproof map speedometer simplifies installation with color coded wiring (black ground, red power, yellow unit toggle) and delivers grade durability for uninterrupted tracking of speed, improve , and location data in harsh environments. Specifications: Component : stainless steel Diameter: about 52mm/2.04inch Speed ​​display ranges: 0-999.9 Package Includes: 1 set Speedometer Gauge note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.