1、Standard USB 1 Type C reversible port can be inserted on both sides, small and portable, it is easy to carry. 2、By metal covered, with beautiful design, and a lanyard hole, you can hang it on the key fob. 3、Compatible with USB0 / , the card reader can read the TF card. (excluding cards) 4、The OTG reader supports phones or tablets with a C-port.Also it is applicable for Mac / Huawei P9 / Xiaomi 5S / Meizu Pro5, etc. 5、Four extended interfaces are USB port, TF card slot, and micro-USB power port, etc. Compact and lightweight, it is easy to carry. 6、Supporting hot swap, plug and play, it also supports OTG function for mobile phones and tablets, supporting a variety of TF / MMC memory card reading without card holder in high transmission speed.