Best in 7 days
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Shipping Estimate
USA
- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 26 - Jul 31
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Cisco C57 DWDM-SFP10G-31.90 Compatible 10G DWDM SFP+ 1531.90nm 80km DOM LC SMF Optical TransceiverCisco C57 DWDM SFP10G 31. 90 Compatible 10G DWDM SFP+ Optical Transceiver Module (SMF, 1531. 90nm, 80km, LC, DDM) Model Name C57 DWDM SFP10G 31. 90 Vendor Name Ecloudlight Form Factor SFP+ Data Rate 9. 95 to 11. 3Gb s bit rates Wavelength 1531. 90nm Distance 80km@G. 652 Connector LC Duplex Cable Type OS2 SMF Transmitter Type EML Receiver Type APD TX Power 0~+5dBm Receiver Sensitivity < 24dBm Power Consumption <1. 5W Modulation Format NRZ DDM Support
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.5 ★★★★★
Based on 132 reviews
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Product Reviews
★★★★★ 5
Style and comfort
Size: Medium, Color: Black
Exactly what I was looking for. Style and sock thickness and comfort.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2025
★★★★★ 5
Comfortable
Size: Medium, Color: Blue
So comfortable! They stay up perfectly love love love
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
★★★★★ 5
Great quality.
Size: Large, Color: (001) Black / Black / White
Thickness and comfort are great. Quality is great and the same I would expect if I bought at the branded storefront.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 5
Great product.
Size: Small, Color: (001) Black / Black / White
🙏🙏🙏
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Great buy!
Size: Medium, Color: (001) Black / Black / White
My husband loves these. The socks are warm and thick and extremely comfortable. They support the foot and he works outside all day and has had them for a little over a month. They stay in place and don’t move move around while he’s outside moving around.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 6, 2025
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