OVAL BRUSH DESIGN Unique shape gently curved sides for smoothing and round edges for smooth volume and curled ends. Mixed Bristles. Brush is designed with Nylon Pin & Tufted Bristles for easy detangling. While the shaft is about 2", the bristle-tip to bristle-tip width is 4" at its widest part IONIC TECHNOLOGY Negative ions saturate the airflow. This helps condition, smooth and make hair shinier, while reducing frizz and static. Less Time, Less Damage. Can truly give you the salon results at home 3 TEMPERATURE AND 2 SPEED SETTINGS low temperature with high speed, for using at the end to style your hair; MIDDLE: medium temperature with low speed, for finer or precise control for styling; HIGH: high temperature with high speed, for rough, dry or thick hair Contact US If you have any problem with the products,please contact us by email,we will reply you within 24 hours andsolve it.ANY THING is negotiable,we just want you happy.