The items in the image are RJ11 Telephone Line Couplers, specifically designed to connect and extend two separate telephone lines. While they look very similar to Cat6 Ethernet couplers, the internal configuration shown (typically 4 or 6 pins) identifies them as telephone adapters rather than 8-pin data network connectors. Specifications Connection Type: RJ11 Female-to-Female. Pin Configuration: 6P4C (6-position, 4-conductor) straight-through wiring. Material: Durable ABS plastic housing. Contacts: Typically feature copper alloy pins with gold plating for improved signal conductivity. Dimensions: Approximately 37 x 17 x 23 mm. Key Features Cable Extension: Simply used for joining two standard telephone cords together to increase overall length. Plug-and-Play: Requires no tools or specialized assembly; cables just snap into place. Accurate Transmission: Designed for voice, ADSL, and VDSL signals with minimal signal attenuation. Corrosion Resistance: High-quality plating on the contact points helps prevent degradation over time, maintaining sound quality. Compact Design: Small and ligh