The AarLogic extension card for Raspberry Pi complements the popular mini-computer with a 4G, 3G or 2G modem & GPS functionality, enabling wireless communication over the mobile network. This means you can communicate wirelessly with your Raspberry Pi at any time and anywhere in the world and send and receive data in real time. The AarLogic expansion card is simply placed on the GPIOs of the Raspberry Pi. In the 4G version, the expansion card is connected via USB. The AarLogic RPi Extension has a SIM card holder and is immediately ready for operation.