It can easily connect the SIM card to the navigation device and provide network connection function. The use of high-quality materials and sophisticated manufacturing processes ensures the stability and reliability of signal transmission and avoids network interruption or weak signal problems. It can realize network functions, such as online map updates, real-time traffic information, Internet search, etc., to provide a more intelligent navigatin experience. It has a card slot design and is suitable for navigation devices of various brands and models. It can be used with various car navigation systems to provide seamless connection and usage experience. Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Colour:black Material:plastic Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 3 * Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.