The adapter is used to convert the mini PCIe slot into a USB3.0 interface, which is backward compatible with USB2.0 Extend the standard USB interface through the mini PCIe port to connect USB3.0 devices The extended USB port can be connected to USB flash drives, USB Bluetooth adapters, WIFI adapters, etc. Size: 52x30x5.2 mm Power supply voltage: output 5V/1A Precautions: The notebook's MINI PCI-E standard includes USB signal and 3.3V power supply. This product leads the USB signal to the USB socket, and boosts the 3.3V to 5V/1A to supply the USB device. Take a look at the above working principle. Because the USB signal is output from the computer, some computers have a bad screen or no signal output at all, which cause the card to be unusable, not a problem with the card. colour: green Material: metal Package Contents: 1 x mini PCI-e to USB3.0 adapter card Only the above package content, other products are not included. Note: Light 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.