Professional hair straightener and curling iron 2 in 1. DUAL PRO styling iron represents the latest technological revolution in professional hair irons thanks to its 3 in 1 system which allows you to straighten, curl and create waves with the same tool. The ceramic-coated iron’s advanced technology and adjustable temperature make it easy to use, allowing you to create a whole range of different styles. Perfect results and a silky-soft finish. - Automatic switch-off after one hour of inactivity. - Ultra-fast PTC heater. Reaches maximum temperature in 40 seconds. - Ergonomic - Dual voltage (110-240V ac / 50-60Hz) 1. Press (and hold) the ON / OFF button to turn on the iron. 2. SMOOTH mode will be automatically activated (inner flat plates) heating to 180°C in a few seconds. 3. Remember that the iron’s temperature can be increased and decreased (between 70°C to 218°C) by pressing the “+” and “-“ buttons next to the ON / OFF button. 4. Press the ON / OFF button once to change to CURL mode (activate exterior plates and deactivate flat plates). 5. The option exists to activate both modes (SMOOTH & CURL) by pressing the ON / OFF button again (which will cause the inner and outer plates to heat simultaneously). 6. To turn the iron off, press (and hold) the ON / OFF button for a few seconds. To check the current working mode, lights indicate whether the SMOOTH, CURL or both functions are activated. For more information, read the instruction manual given with the device.