In daily electricity usage, the direct hazards of high voltage include accelerated aging of electrical equipment insulation and reduced lifespan. If the voltage exceeds a certain range, it can directly burn out electrical appliances such as TVs, DVDs, stereos, and more, with severe cases leading to equipment damage or even fire hazards. On the other hand, low voltage can result in increased current flow due to the fixed rated power of the load, which can cause significant damage to motors and air compressors. Examples of appliances affected by low voltage include refrigerators, freezers, water pumps, washing machines, and air conditioners. Our voltage protector series products offer an economical and practical solution to address this issue. Taking a 220V protector as an example, we have a preset value, let's say the factory-set operating range is 165-250V. When the voltage falls below 165V or exceeds 250V, our product will cut off the power supply to protect the electrical appliances. Once the voltage returns to the set range, the power supply will automatically be restored.