10GBASE-SR Module supports a link length of 26 m on standard FDDI grade MMF. Using 2000 MHz*km MMF (OM3), up to 300 m link lengths are possible.
Cisco 10GBASE-SR X2 Module, IEEE 802.3ae, Laser Class 1 21CFR-1040 LN#50 7/2001; Laser Class 1 IEC60825-1, 0 - 40 °C, -40 - 75 °C, 1.42 x 3.58 x 0.53" (36 x 91 x 13.5 mm)
Cisco 10GBASE-SR X2 Module. Compliance industry standards: IEEE 802.3ae. Safety: Laser Class 1 21CFR-1040 LN#50 7/2001; Laser Class 1 IEC60825-1. Dimensions (WxDxH): 1.42 x 3.58 x 0.53" (36 x 91 x 13.5 mm)