The NETGEAR 10 Gigabit Stackable Managed Switch, XSM7224S comes with a removable power module for the main power supply with a second internal redundant power supply available as an option. Two removable fan trays increase the availability of the system, providing front-to-back cooling airflow for best compatibility with data center hot aisle/cold aisle airflow patterns. Like all NETGEAR ProSafe Managed Switches, the XSM7224S is backed by the NETGEAR ProSafe Lifetime Warranty.