5 Pack CAT3 Phone keystone jack white, with 4 screw terminals on breakout board for wire termination RJ11 6P4C interface, universally compatible with all RJ11 devices such as landline phones, fax or answering machines etc. Standard keystone size, fits most blank wall plates, patch panels or surface mount boxes in the market Category 3 standards, 50 micron gold plated pins, provides stable connection and fast transmission Easy to install with a small screwdriver (Not provided). For detailed pinout, please refer to the 4th product image