Fedus Pack of 5 RJ11 Coupler, Telephone Phone Line Connector Coupler RFAdapter RJ11 6P4C Inline Coupler Keystone Jack Female to Female Straight Telephone Cable Cord Extension Adapter White Wired Ethernet Lan Adapter compatible with Windows  (1000 Mbps)

" • HIGH QUALITY - RJ11 inline coupler is used to connect and extend two existing telephone lines with R11 telephone connector at both ends through telephone through box. • SMOOTH CONNECTION - Compress all the spare space, accurate signal transmission, small and exquisite, compact, and durable. Easy to install and no static or distortion of voices. • WIDE RANGE OF USE - Phone line coupler can be used for all telephones and fax machines, and is an assistant for office meetings, Premium Quality Inline Coupler for join 2 RJ11 telephone lines together, Extends phone line connections. • HIGH-QUALITY MATERIAL - Phone line coupler High-quality PVC internal insulation, strong anti-interference ability, oxygen-free copper conductor, high-fidelity design, and exquisite craftsmanship. • 3 MICRON GOLD PLATED PINS - It has high fidelity sound quality, exquisite workmanship, strong anti-interference ability and low signal attenuation coefficient. Provides good solid connection without signal loss."