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 of some instruments and equipment, etc.) Fast reading speed: SD card expansion never affects the reading and writing speed of the machine, 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 thing. The measurement allowed error is +/- 1-3cm.