The Cisco QSFP-40G-LR4-S is a high-quality 40GB-LR4 QSFP SMF LC optic transceiver designed for use with Cisco networking equipment. This unit features a hologram for authenticity and is part of Cisco's Enterprise product line, making it suitable for enterprise networking applications. With one module and one port, this transceiver provides fast and reliable optical connectivity for servers and networking devices. Perfect for businesses looking for a durable and trusted networking solution, the Cisco QSFP-40G-LR4-S is a top choice for those in need of high-speed data transmission.