Best in 7 days
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Ships within 48 hours · Estimated delivery Jun 14 - Jun 19
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Description
Fiberso QSFP+ 40G Module ER4 40Km 1271-1331nm LC SM Fiber Optical Transceiver Compatible with SwitchesWe offer three years warranty, and lifetime technical support! Compatible with all the switch brands in the market, please feel free to contact! PN Description Data Rate Reach Connector Wavelength(nm) TX RX Fiber Output PowerdBm Sensitivity FO QSFP40G SR4 QSFP+ SR4 40Gb s 100m MPO 850 VCSEL PIN MM 7. 6~2. 4 < 9. 5 FO QSFP40G IR4 QSFP+ 2KM 40Gb s 2Km LC 1271~1331 DFB PIN SM 7~1 < 11. 5 FO QSFP40G LR4 QSFP+ LR4 40Gb s 10Km LC 1271~1331 DFB PIN SM 7~2. 3
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
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.4 ★★★★★
Based on 2357 reviews
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Product Reviews
★★★★★ 5
Quality Under Armour socks
Size: Large, Color: (100) White / White / Black
Nice medium thick sock that is breathable but cushioned. It stays put in the show and doesn’t fall down. Fit is true to size, no show/minimal show
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Perfect Pairs
Size: Large, Color: (100) White / White / Black
Very comfortable, soft & affordable..
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Reviewed in the United States on May 19, 2026
★★★★★ 5
Excellent athletic socks
Size: Large, Color: (100) White / White / Black
Solid athletic socks at a great price. Not too thick, not too thin. Second time I've purchased them. They last longer than most socks I've used in the past too.
Only concern is the sizing. I may be reading the sizing chart wrong, but for my size 13 feet it says XL are the correct sock size. I've ordered Large twice and they're perfect. I would imagine the size Large socks would also fit up to size 14 shoe, but probably need to go with XL if foot is lager than 14.
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Reviewed in the United States on April 12, 2026
★★★★★ 4
Great product
Size: Large, Color: (035) Steel / White / Black
Comfortable fit perfect
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Reviewed in the United States on March 15, 2026
★★★★★ 5
Quality No Show Socks That Are Comfortable and Durable
Size: Large, Color: (100) White / White / Black
These Under Armour no show socks are great for everyday training and casual wear. The cotton blend feels comfortable and they stay in place throughout the day. Getting six pairs in a pack is solid value for a quality brand. They hold up well after multiple washes and the no show style works great with most athletic shoes. A reliable go-to sock.
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Reviewed in the United States on April 30, 2026
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