Product UPC: 071040168876 Stackable switches that combine advanced features for growing businesses with easy operation and an affordable price. Common features: True stackingAdvanced security and QoSLayer 3 switching: static (500 models), dynamic (500X models)IPv6 supportEnergy-efficient design and EEEEasy-to-use web-based management tool, CDP, Auto Smartports, CCA, Textview (CLI) and Cisco FindIT utilitySimple Network Management Protocol (SNMP) supportLimited lifetime warranty with next business day (NBD) advance replacement