D-Link DEM-311GT. SFP transceiver type: Fiber optic, Maximum data transfer rate: 1000 Mbit/s, Interface type: SFP. Package width: 74 mm, Package depth: 131 mm, Package height: 49 mm. Shipping (inner) case length: 36 cm, Shipping (inner) case width: 26 cm, Shipping (inner) case height: 31 cm