This Cisco® QSFP-40G-SR4 QSFP+ transceiver provides 40GBase-SR4 throughput up to 5m over multi-mode fiber (MMF) using a wavelength of 850nm via a 4xLC connector. It is built to meet or exceed the standards of Cisco® and is uniquely serialized and data-traffic and application tested to ensure that they will integrate into your network seamlessly. Digital optical monitoring (DOM) support is also present to allow access to real-time operating parameters. This transceiver is Trade Agreements Act (TAA) compliant. We stand behind the quality of our products and proudly offer a limited lifetime warranty.