edge grinding design, and not cut hands, more stable contact without jamming, no delay and faster card reading. Not loose and resistant to plugging and unplugging The interface design conforms to the standard and fits firmly with the device. The TF card slot has a unique "" design, and the memory card can be inserted by rebounding to avoid breakage. High-speed transmission plug and play. Small and convenient, portable, easy to use test cards. Type: memory card test board Interface: USB 2.0 Support memory card: SD card, TF card Installation : external color:Green Material:PCB Package Contents: 1 x Test Board 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.