A. This RJ11 to RJ45 adapter is made of materials that can withstand long - term use. It is made of ABS and copper, which has durability and is not prone to deformation. The fine workmanship ensures its practicality. This RJ11 to RJ45 adapter will make network conversion easier and smoother. B. Features: - Color: Black - Material: ABS, copper - Dimensions: 4500.00×1.00×0.10 cm / 1768.50×0.39×0.04 inches - Adapter from telephone RJ11 6P4C female connector to Ethernet RJ45 8P8C male connector. - The materials help maintain good signal transmission and sound quality. - It is easy to use and can connect analog telephone devices (telephones, fax machines, caller ID devices) through the Ethernet interface. - The connector is firmly connected, with stable contact and relatively high transmission efficiency. - It has exquisite craftsmanship, a reasonable structure, and is professional and practical, bringing convenience to you. C. Packaging list: 2 RJ11 to RJ45 adapters