USource 40G/100G QSFP28 BIDI supports multi rate 40Gb/s and 100Gb/s bit rates. This Bi-Direction optical module is 100% compatible with CISCO QSFP-40/100-SRBD. The module integrates four host electrical data into two optical lanes (by Dual Wavelength VCSEL Bi-Directional Optical Interface, 850nm, and 900nm) to allow optical communication over a 2-fiber duplexLC optical multi-mode fiber.