***** **********Best Quality Guranteed. *****Compatibility - fit for Arista SFP-10G-SR and other open switch, please contact us, any product quality and compatibility issues*****Main Specs - 10Gb/s data rate, single-mode, duplex LC connector, 850nm wavelength, up to 300m transmission distance, DDM support*****Usage - rotat the ring latch down at 90 degree angle to unlock, then insert it to the port*****pplication - used in fiber switches, routers, NIC, server or other fiber optic equipments with 10Gb SFP + ports*****30 days Free-Returned, 3 years Free Warranty and lifetime technology support