Transition Networks F-SM-MM-04 Gigabit Single Mode to Multimode Media Converter.Model Number: F-SM-MM-04Specifications:- Dimensions (H x W x D): 3.0" x 3.0" x 4.7"- Fiber Mode Supported: Multi-mode, Single-mode- Form Factor: Internal- Maximum Distance Supported: 15.53 Mile- Media Type Supported: Fiber- Network Technology: 1000Base-SX; 1000Base-LX- Number of SC Duplex Ports: 2