The 25cm long design makes it flexible and long enough to expand and read SD cards. Support that need to extend the memory card TF (-SD) (such as data upgrade of car GPS navigator, data update of some instruments and equipment, etc.) Fast reading speed: SD card expansion never affects the reading and writing speed of the machine, keeping the efficiency and safety of the machine. Also works as an extender or linker when your device has a built-in -SD memory card slot and you need to expand it externally to use a larger SD memory card. The cables are flexible and easy to install. Type: extension cord Working voltage: DC 12v Interface: -SD Support memory card: -SD TF Installation : external color:White+black Material:ABS+FFC size:25cm Package Contents: 1 x Extension Cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.