You received a smart card with a chip and a USB key.
Step 1:Snap off the card with a chip as shown in picture below.
Step 2:Place a small card with a chip under the notch in the lid, as shown in the picture (make sure to do it properly).
Step 3:Connect the lid to the rest of the USB key.
Your digital certificate on a USB key is ready for use.
To install the driver for USB key, read the instructions HERE