Description Edge grinding design, won't cut hands, more stable contact without jamming, no delay, and faster card reading. Not loose and resistant to insertion and removal. The interface design conforms to the standard and fits snugly with the device. The TF card slot has a unique design, and the memory card can be inserted by bouncing back to avoid breakage. High-speed transmission plug and play. Small and convenient, portable, easy to use test card. Type: memory card test card Interface: USB 2.0 Support memory card: SD card, TF card Installation: external Color: Green Material: PCB Package contents: 1 x test card 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 to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm.