D-Link | Multi-mode Transceiver | DEM-QX10Q-LR4 | Single-mode | QSFP+ Connector | Wavelength 1271 nm, 1291 nm, 1311 nm, 1331 nm | Maximum transfer distance 10000 m | The transceivers all support 40G Ethernet, which results in very fast data transmissions of up to 40 Gbit/s; The transceivers use the Quad Small Form-factor Pluggable Plus format (QSFP+) connectors, which integrate four transmitting and four receiving channels