Operating Instructions: 1.Insert the plug into the correct power supply our hair iron is universal voltage adapt to 110v-240v 50/60HZ. 2.Press the power button for 3 seconds the hair iron will begin to work and heat up then press the "UP/DOWN" button to adjust the temperature. 3.Within 30-50 seconds the heating plates will reach to the default temperature the hair iron is ready to use now. Keep away from water: 1.Always unplug quickly after using 2.Do not use the hair iron while bathing. 3.Do not place or store the hair iron near the bathtub or sink.