usb接口公对母，用于usb接口的延长，保护usb接口，可接移动硬盘，读卡器，u盘，无线网卡，手机等等数码设备

长度约30cm
usb interface male to female, for the extension of the usb interface, usb interface protection, removable hard drive, card reader, u disk, wireless LAN, mobile phones, etc. Digital equipment

Length of about 30cm