A two-conductor shielded cable similar to a TV coaxial cable, RG58 is usually called a "thin coaxial cable", and its characteristic impedance is 50 ohms. In the video field, it is mainly used for Ethernet. Communication systems and control systems; video surveillance lines, broadcast signal control, public television antennas, closed-circuit television monitoring systems, radio communications, transmission systems, and one-way control or internal wiring for high-frequency equipment.