This is a Coretek Opto 1000BASE 1.25Gbps 850nm/MM fiber channel SFP transceiver. Its part number is CT-1250MSR-SB1L. This item is new and has never been used. It comes as pictured and does not include any additional parts or accessories.

Specifications:

• Manufacturer: Coretek Opto
• Part Number: CT-1250MSR-SB1L
• Data Rate: 1.0625/1.25G
• Distance: 550m
• Tx Power Range (dBm): -9.5 ~ -4
• Rx Sens (dBm): -17