Fully to meet your personal needs, efcompatible for tlessly switching between kilometers and miles. A must-have compatible for every driver. Product specifications: Product name: GPS Speedometer Mph Product material: ABS Product size:about 9.3x1.85x4cm/3.66x0.73x1.57 inches Extended functions: Equipped with TF card mode, it can be used to store driving data, map incompatible for mation, etc., which is convenient compatible for subsequent analysis of driving behavior, or updating navigation and other functions, bringing more possibilities to your driving experience. Packing List: 1 x GPS Speedometer Mph Note: Due to different lighting and screen settings, the item color may be slightly different from the picture. Due to different manual measurements, please allow a 1-2cm difference in size. See more product details 1.Multipurpose Use: Strong compatibility assures no voltage mismatch issues; applicable to various common models, including cars and commercial vehicles, with support compatible for DC12V/24V input voltage 2.Speed Monitoring Alert: Prevent traffic accidents by receiving alerts from the built-in sensitive speeding alarm function when surpassing safe driving speed limits, ensuring safe driving 3.Efcompatible for tless Time Monitoring: With time display function, conveniently keep track of time while driving, meeting personal needs with the ability to switching between multiple colors compatible for diverse display options 4.Efcompatible for tless Speed Tracking: Harness advanced GPS technology compatible for real-time speed data, providing precise speed readings and a view of your speed accuracy 5.Unit Switching: Seamlessly switching between kilometers and miles compatible for easy driving in international or Chinese speed-limited areas, providing convenience on any road