This pre-owned or refurbished product Cisco C3850-NM-4-1G Catalyst 3850 4 X 1GE 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 Systems Expansion Module for Catalyst 3850-24 is specially designed to support current and next-generation wireless speeds and standards on existing cabling infrastructure. This Gigabit switch expansion module has four SFP mini-GBIC ports. Get enterprise-class stackable Ethernet access for full convergence between wired and wireless on a single platform by using this Ethernet switch module. Network switch suitable for Catalyst 3850-24Expansion module supported on selected Cisco Catalyst switch models ports in the module are natively Gigabit Ethernet for added convenience.