This pre-owned or refurbished product Cisco Small Business SG300-52 SRW2048-K9 has been professionally inspected and tested to work and look like new. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee. The Cisco 300 Series, part of the Cisco Small Business line of network solutions, is a portfolio of affordable managed switches that provides a reliable foundation for your business network. These switches deliver the features you need to improve the availability of your critical business applications, protect your sensitive information, and optimize your network bandwidth to deliver information and applications more effectively. Easy to set up and use, the Cisco 300 Series provides the ideal combination of affordability and capabilities for small businesses and helps you create a more efficient, better-connected workforce. Support of Energy Efficient Ethernet (EEE) and reduction of energy consumption by monitoring traffic and putting links into sleep mode during quiet periods. Power-saving technology allows switches to enter sleep mode, turn off unused ports, and adjust power as needed.