<b>Secura SC-6L Hair Straightening Comb: Features six (6) temperature levels designed to work with any type of hair. Temperature ranges are 265°F~395°F with operating temperatures achieved within 40 seconds for level 1 and 80 seconds for level 4. An automatic 20 minute shut-off safety feature turns the comb off in the event you forget. <p>Temperature levels: <p>Level 1, which is approximately 265°F (130°C ), is recommended for combing straight hair or soft and thin hair.<p> Level 2, which is approximately 290°F (145°C ), can be used with blonde, bleached or dyed hair.<p> Level 3/Level 4, which is approximately 320°F (160 °C ) / 350°F(175 °C), is recommended for average and slightly curly hair.<p> Level 5/Level 6, which is approximately 375°F (190 °C) / 395°F (200 °C), is recommended for thick, curly or coarse hair.<p> Only for use with North American Electrical Standards, 120V 60Hz AC. 2-year warranty.