I have 4 of these.  Will discount if you buy more than one.     The X440-G2 Series is a scalable, cost-effective family of stackable edge switches designed for campus edge applications. Each X440-G2 model is powered by one of Extreme’s flagship operating systems, ExtremeXOS, a resilient OS providing continuous uptime as well as manageability and operational efficiency to the campus edge. The X440-G2 Series switches provide high-performance routing and switching, flexible stacking, PoE support, and comprehensive security.