Shenzhen Changyu Network Co., Ltd is famous as a professional in the aftermarket field for mainly used Cisco over 9 years.We have been dedicated to be a qualified manufacturer as well as a distributor with abundant experiences among domestic and worldwide customers.We have grown out of the used Cisco business by exporting, importing and domestic consumption mainly for original used cisco switchs, cisco routers, cisco firewalls, cisco modules , cisco SFPs, MINI GBICs and cisco voices.We offer three-month warranty and lifetime technical company is based on honesty and moral integrity, small profits and good sales.Upon our constant development and investment, our products range is continuously expanding.Our products have been exported to more than 30 countries.Shenzhen Changyu Network Co., Ltd is a well revaluated by our prominence customers in Europe, Asia, Australia and South America, in compliance with verified quality and sincere service reputation.Shenzhen Changyu Network Co., Ltd is a here and ready to assist you with any questions or concerns you might have before or after the purchase. .Do not hesitate to contact us anytime .Welcome & Enjoy Purchasing !