does this work with telephone line?

Yes, the RJ45 coupler works with telephone line but you need to use Cat7, Cat6, or Cat5e to get the speed effect. Hope this helps

Are these couplers capable of 10gbps or 1gbps? The description says 10gbps but the specification says 1gbps.

Hi friend, The RJ45 coupler Ethernet extender supports 1Gbps at max. Hope it helps.

can i connect 4 150ft ethernet cords to them?

Yes and No. The maximum allowed length for ethernet is 328 ft, but you can use an ethernet switch to extend another 328 ft. So, you can actually go the desired length (600 ft) by connecting as follows - 150' cable, coupling, 150' cable, switch, 150' cable, coupling, 150' cable. Here's a typical 5 port switch - NETGEAR ProSAFE 5-Port Gigabit Ethernet Switch (GS105 v5) ~$30

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RJ45 Coupler 5 Pack, Cat7 Ethernet Female to Female | Female to Female Coupler with Thunder Protection. Extends Cat7/Cat6/Cat5e Cables. 5 Pack for Home/Office Networks

Product ID: 47943701

Details

Brand
UGREEN
Cable type
Ethernet
Compatible devices
Network with
Connector type
Ethernet RJ45
Special feature
Inner metal

⚡1000 Mbps Gigabit Speed

🔗Universal RJ45 Compatibility

🛡️Full Metal EMI Shielding

$23.27

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Description

🔌 Connect Like a Pro, Extend Like a Boss

PLUG PLAY SIMPLICITY - No drivers, no hassle—just snap two cables together and keep your workflow smooth.
VERSATILE COMPATIBILITY - Works effortlessly with Cat5 to Cat8 cables, future-proofing your network needs.
COMPACT DURABLE DESIGN - Sleek ABS housing resists heat and aging, perfect for tight home or office setups.
ROCK SOLID SIGNAL INTEGRITY - Inner metal shielding blocks interference for flawless data flow up to 50 meters.
SEAMLESS GIGABIT CONNECTIVITY - Extend your network without losing speed—up to 1000 Mbps, guaranteed.

The UGREEN RJ45 Coupler 5 Pack offers a professional-grade solution to extend Ethernet cables with zero speed loss. Featuring full metal shielding to prevent EMI interference and supporting up to 1000 Mbps data transfer, these female-to-female Cat7 couplers ensure stable, high-speed network connections. Compact and durable, they fit seamlessly into any home or office setup, compatible with a wide range of Cat5 to Cat8 cables.

Specifications

ASIN	B016B13U5S
Best Sellers Rank	27,410 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 484 in Ethernet Cables
Brand	UGREEN
Cable Type	Ethernet
Colour	Black
Compatible Devices	Network devices with RJ45 connector
Compatible Phone Models	No Compatible Phone Models
Connectivity Technology	Ethernet
Connector Gender	Female-to-Female
Connector Type	Ethernet, RJ45
Country Of Origin	China
Customer Package Type	Box
Customer Reviews	4.6 4.6 out of 5 stars (3,576)
Data Transfer Rate	1000 Megabits Per Second
Ethernet Cable Category	Cat 6
External Testing Certification	Não aplicável
Frequency	1000 MHz
Indoor Outdoor Usage	Indoor
Item Shape	Flat
Item Weight	0.11 Kilograms
Manufacturer	Ugreen Group Limited
Manufacturer Part Number	2724595936114
Model Name	20390P5
Model Number	20390P5
Number of Items	5
Number of Pins	64
Other Special Features of the Product	Inner metal shielding layer for stable speed
Outer Material	Plastic
Recommended Uses For Product	Ethernet cable extension and combining
Specification Met	EIA, TIA
Unit Count	5.0 count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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$23.27

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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