The Huawei E5372s is a 4G LTE mobile Wi-Fi hotspot (often categorized as a "MiFi" device). Unlike a standard USB modem (dongle) which connects to a single laptop, the E5372s creates a Wi-Fi hotspot that allows up to 10 devices to connect simultaneously.
: A brief HUAWEI E5372 Guide covers the basic interface and settings.
Here’s a proper, step-by-step guide to installing and using the modem/driver on a Windows PC.