The Cisco QSFP-100G-SM-SR is a 100GBase-CWDM4 Lite QSFP transceiver module. It supports a link length of up to 2 km utilizing singlemode fiber (SMF). This transceiver features LC duplex connectors. It carries the 100G signal over 4 wavelengths, utilizing multiplexing and demultiplexing technology. This module is interoperable with the QSFP-100G-CWDM4-S.