Network Coupler, Ethernet Cable Extender Female to Female, Cat6 Inline Couplerin, Cat5 Connectors, for Cat7/Cat6/Cat5/Cat5e Ethernet Extension Cable (10 Pack Blue)
Brand: ZUZONG
Color: RJ45 Coupler 10pack Blue

RJ45 Female to Female Coupler
Ideal tool for extending your home or office network, ensure a secure and corrosion free ethernet connection by connecting 2 short male network RJ45 cables together and work as one cable.
Made of high quality environmentally friendly PVC material, with high impact resistance, heat and low temperature resistance etc. advantages. Interactive snap-in buckle design, firm and reliable connection.
Thickened PCB Board, Metallic Shielded,Robust and Durable
Compatible with Cat-5, CAT-5e, CAT-6,CAT-6a and CAT-7 Ethernet cords.
Package Contents:
10 x RJ45 Couplers
Note:
Can not use with a keystone jack.
It is not for a phone cable, but for an Ethernet cable.
They are only compatible with RJ45, NOT compatible with RJ11.

RJ45 Coupler Usage: Connecting 2 male network cables together and extend the length of network cable.
RJ45 Coupler Meets Category 6 performance in compliance with the TIA/EIA 568-C.2 standard. RoHS compliant.
Ethernet Cable Extender: Using this RJ45 in-Line Coupler can save cost and time compared with replacing a network with insufficient length.
They have nickel-plated contacts and snap-in fixtures to aligned accurately and safely to achieve reliable connections.
RJ45 Ethernet couplers are compatible with Cat7/ Cat6/ Cat5 and Cat5e networks.