The 1.25-2.0mm² twisted pair PVC insulated copper cable is a multi-functional cable integrating signal transmission and power supply, with a rated voltage of 300V. It covers four specifications: 1.25mm², 1.5mm², 1.75mm², and 2.0mm², and is widely used in low-voltage signal and power transmission scenarios in smart homes, security monitoring, industrial control and other fields.​ The core advantage of this cable lies in its twisted pair structure design. By twisting two insulated copper conductors together, it can effectively counteract electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring the stability and accuracy of signal transmission. The conductor is made of high-purity electrolytic copper with excellent conductivity. The DC resistance of 1.25mm² conductor does not exceed 15.8Ω/km, and that of 2.0mm² does not exceed 9.5Ω/km, which can simultaneously meet the power supply of low-power equipment and lossless transmission of high-frequency signals.​ The PVC insulation layer has good insulation performance (insulation resistance ≥100MΩ) and environmental resistance, and can work stably in the temperature range of -20℃ to 60℃, resisting moisture, dust and slight chemical corrosion, and is suitable for various indoor and outdoor installation environments. The 1.25mm² and 1.5mm² specifications are often used in signal and power supply lines of smart home sensors (such as temperature and humidity sensors, human body sensors); the 1.75mm² and 2.0mm² are suitable for security cameras, small motor control modules and other equipment that need to transmit both signals and power, supporting a data transmission rate of up to 10Mbps, meeting most low-rate signal transmission needs.​ The production process strictly follows industry standards. The insulation materials do not contain halogens or heavy metals, meeting environmental protection requirements. The overall flexibility of the cable is strong, with a minimum bending radius of 6 times the outer diameter of the cable, which is convenient for wiring in narrow spaces. Whether it is wall embedding, trunking laying or internal equipment connection, it can maintain good mechanical performance and transmission stability, making it an ideal choice for small electronic system integration.