SODIAL(R) RJ45 Plug to BT RJ11 Secondary Splitter Telephone Adapter Plug Type: Male RJ45 (8P4C) Socket Type: Female BT (6P6C) Female RJ11 (6P4C) Material(External): Plastic Size: Socket Case: ~2 1/16" x 15/16" x 3/4" (L*W*H); Cable Length: ~4 1/2"