


RS-232/422/485 To Fiber Converter, WDM-B 20KM, TX1550nm - RX1310nm, SC Connector
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
RS-232/422/485 To Fiber Converter, WDM-B 20KM, TX1550nm - RX1310nm, SC ConnectorThe STF 300C WB20 provides a fiber converter solution to extend RS 232 or RS 422 RS 485 transmission distance up to 20km over single mode fiber (WDM). The converter is equipped with multiple interface circuits, for connection to RS 232, RS 423, or RS 422 485 (2 or 4 wire). The STF 300C WB20 secures data transmission over EMI resistant fiber at speeds up to 256kbps for RS 232 or up to 1024kbps for RS 422 485.
Quick Dispatch:
Your RS-232/422/485 To Fiber Converter, WDM-B 20KM, TX1550nm - RX1310nm, SC Connector orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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Product Reviews
★★★★★ 5
It all good
Style: Dress, Color: Gold Tone Stainless Steel
Very nice watch love it and the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
★★★★★ 5
Good
Style: Dress, Color: Gold Tone Stainless Steel
the nicest watch I've used recently
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Reviewed in the United States on April 5, 2026
★★★★★ 4
As described..handsome watch
Style: Dress, Color: Two-Tone Gold/ Blue Dial
Christmas gifts my sons will remember..beautiful watch.
Easy to adjust the bracelet if you buy the kit..
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Reviewed in the United States on February 9, 2025
★★★★★ 5
Great affords
Style: Dress, Color: Two-Tone Gold/ Blue Dial
Absolute great watch. It’s perfect for an every day and situation from work to date night. I had to take out 4 links and now it fits perfectly!
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Reviewed in the United States on July 5, 2025
★★★★★ 5
SOLID unit and woth the price!
I can't speak for anyone but me, but this is my opinion of this product. I travel a lot. I recently went on a trip to the Mediterranean, (Italy, Spain, France), and needed a new adapter. I'm a computer engineer so I needed something that could handle a MacBook Pro, A windows gaming laptop, Bluetooth headphones, an iPad and 2 phones, (all at the same time). This handled all that with no issues. This would have earned it 4 stars because it's supposed to handle multiple items. The extra star is the fact that it is heavy enough to stay where you place it, has a good cord length, and a nice plug selection. Mine was the 2 prong (Mediterranean)base prong with a U.S 2 prong and a 3 prong version for England, Ireland ETC. The U.S and Brit version fit together like Legos and both fit snugly on the Med prongs. I have used the Med version for 14 constant days with no issues or heating problems. I'm on day 4 in the states and no issues. I can't speak on the Brit adapter yet, but I see no reason this would change. It also has a USB-C slot, in addition to 4 USB slots and the 3 pronged slots for laptops ETC. Please keep in mind, that this is JUST an adapter, it does NOT convert voltages. It's not supposed to.
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Reviewed in the United States on July 2, 2022