Designed to dry, boost roots, and create bold styles for any length Unique Non-Detachable Round Brush Design for Smoothing the Hair, while the round edges create volume Designed with Nylon Pin Bristles for adding extra body, creating soft curls, and flips 3 Heat/Speed Settings with Cool option for styling flexibility Volumizer root booster meets U.S. safety requirements, unit is designed for 120 Volt USA outlets only.