This is a black PE outdoor telephone cable, which is a type of copper drop wire with a specification of 2 core parallel 2×0.80mm, specially designed for overhead application scenarios.​ Its structure consists of 2 parallel copper conductors with a cross-sectional area of 0.80mm². The copper conductors have excellent electrical conductivity, which can ensure the stable transmission of telephone signals and reduce signal attenuation. The insulation layer is made of polyethylene (PE) material and is black. PE material not only has good electrical insulation performance, which can effectively isolate external interference and ensure the quality of signal transmission, but also has excellent weather resistance. It can resist the erosion of outdoor natural environments such as sunlight, wind and rain, and high and low temperatures, thus extending the service life of the cable.​ As a telephone cable for overhead applications, it is suitable for the erection of outdoor telephone lines and can be widely used in scenarios such as urban communication networks, rural telephone line connections, outdoor communication wiring in industrial parks and residential communities. Its 2-core parallel design is convenient for overhead installation, can work stably in the overhead environment, and provides reliable line support for telephone communication.