RS-232/422/485 To Fiber Converter, Multi-Mode 2KM, ST Connector

RS-232/422/485 To Fiber Converter, Multi-Mode 2KM, ST Connector

Marsoni

M251S

$119.50

Get it in 3 business days with 1 day shipping. Friday, May 29

RS-232/422/485 To Fiber Converter, Multi-Mode 2KM, ST ConnectorThe STF 300C TM02 provides a fiber converter solution to extend RS 232 or RS 422 RS 485 transmission distance up to 2km over multi mode fiber . 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 TM02 secures data transmission over EMI resistant fiber at speeds up to 256kbps for RS 232 or up to 1024kbps for RS 422 485.

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The item works great. I was having issues with video conference calls even with strong wifi in my house. I bought this adapter due to my HP laptop not having an Ethernet port. This worked great right out of the box. It was detected automatically and as soon as I plugged the Ethernet cable into the adapter, my laptop immediately switched over to that and my internet became more stable.

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Reviewed in the United States on May 8, 2026

Verified Purchase

Brandon Huber

Battle Creek, US

★★★★★ 4

It's functional but not as fast as I expected.

Size: USB C to Ethernet Adapter

For Android phone Samsung Flagship Galaxy Series phones... at best getting 136 Mbps, which is 0.136 Gbps. But it is working and allowing me to transfer files within my network. No where near a Gigabit transfer. I will likely keep it because I have another use case for it (a faulty Ethernet on a laptop) and don't get me started with the abyssal wifi speeds on laptops. This deserves at best 4 stars.

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Reviewed in the United States on May 24, 2026

Verified Purchase

Maria Cross

Lowell, US

★★★★★ 5

Great item

Size: USB C to Ethernet Adapter

Works like a charm. Easy set up.

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Reviewed in the United States on May 21, 2026

Verified Purchase

M&M

Belleville, US

★★★★★ 5

Overkill In A Good Way

Size: 1.5FT, Size: 1.5FT

Bought this UGREEN Cat 8 Ethernet cable to connect my router to my modem, and it works perfectly. Build quality is excellent — thick braided but bendable cable, solid connectors, and it clicks in snug. Definitely feels more durable than the cheap cables you usually get. Speeds are stable with no drops or lag, and setup was plug-and-play. The 1.5 ft length is perfect for short runs and keeps everything looking neat instead of having extra cable everywhere. Is Cat 8 probably more than most people need? Yeah, as it is more than enough for home internet speeds of 1 to 2 gigs. But for its value, it’s nice to know it’s future-proof for many homeowners and the speeds currently offered by today’s ISPs. Would absolutely buy again.

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Reviewed in the United States on January 31, 2026