RJ plugs are divided into two types: unshielded and shielded. The shielded RJ plug is covered with a shielding cladding, and its physical appearance is no different from that of an unshielded plug. There is also an industrial shielded RJ plug specially designed for the factory environment, which is used in conjunction with the shielded module. RJ plugs often use a non-slip plug sheath, which is used to maintain the connection plug, prevent sliding and facilitate plugging. In addition, it has a variety of colors to choose from, which can provide the same color as the embedded icon for correct connection.