The power indicator light will turn on when the unit is plugged in and ready for use. This product may not work with certain high-power appliances like hair dryers. Please check your appliance label to see if it requires less than 6A. The plastic material of the conversion plug socket is made of high-quality engineering flame-retardant material, with a fire rating of UL94V-0 and a voltage resistance of 3000V. The design of circuit adopts a protective circuit to prevent accidental situations such as lightning strikes and excessive instantaneous currents. This travel adapter is equipped with a high-performance intelligent IC charging module control, which can effectively ensure charging quality and extend battery life.