This kit contains all accessories needed to start use your first Yoctopuce device together with a YoctoHub-Ethernet or a YoctoHub-Wireless: an regular A-to-microB USB cable, and a microB-to-microB cable to easily connect the device to the hub. You can then later mount the device directly on the hub using the 5 threaded spacers and M2.5 screws, and connect them without cable using the board-to-board connectors (to be soldered).