Netgear 2x40G QSFP+ Port Card - For Data Networking, Optical NetworkOptical Fiber40 Gigabit Ethernet - 40GBase-SR4, 40GBase-LR4, 40GBase-CR4 - 2 x Expansion Slots - QSFP+

Expansion Module with data networking application/usage for maximum productivity and usability With 40GBase-SR4 technology, enjoy up to 40Gbps data transfer rate over optical fiber cable 40 Gigabit Ethernet for efficient data transfer and fast connectivity Supports optical fiber cable for durable performance, minimal signal loss, and fast data transfers to greater distances Expansion Module is the single answer to all your desired and specified application execution and expansion needs