Specifications: Product size: 28*6*4cm Gross weight: 0.5kg Input Power: AC100-240V?50/60Hz Average power: 45W Heating method: PTC Max Temperature: 446 degF(230?) Auto power-off: 30mins On/ off: long press button Bottoms: ON/ OFF?long press 3 seconds. + Plus button: short press plus 5 °C every time, long press will plus temperature fast. - Minus button: short press minus 5 °C every time, long press will minus temperature fast. Lock button: when it's lock, LCD shows "LOC". Usage: 1. Separate a section of hair to be straightened. 2. Place Simply Straight brush close to the roots of selected hair. 3. Hold the hair firmly and brush down from root to tip. 4. Repeat steps 1-3 times. (After use, press the On/ Off to turn off the brush, then unplug it. Wait until the brush is completely cooled down before handling or storing) Recommended Temperature Setting for Hair Types 1. 410-446 degF (210-230 degC) - recommended for thick or wavy hairs. 2. 374-410 degF (190-210 degC) - recommended for natural textured hairs. 3. 374 degF (190 degC) - recommended for slim hairs. Suggestions above can be adjusted by your own situation and habit. Match with a suitable time and speed can make it have a better effect. Advantages - Beauty Star vs Competitors 1. All shell adopts to US high-temperature engineering plastic materials, PET/PPS/PAEE. 2. European electronic motherboard adopts to CE certification standards. 3. Faster results and ease of operation vs traditional hair straighteners and competitors. 4. Less hair moisture loss compared with traditional hair straighteners and competitors. 5. Professionally designed elegant appearance that is safe and easy to use. Lighter-0.4KG!! To toggle between Celsius (degC) and Fahrenheit (degF) temperature unit press "+" and "-" at the same time.