Classic. Improved bristles! Replaceable. Improved V-Cut stationary bristles for better cleaning action. Brush Head is replaceable. To Replace Brush Head: To remove old brush head, twist counterclockwise 90 degrees and pull away from handle. Slide on new head and turn clockwise 90 degrees until arrows are aligned. Batteries are Replaceable: To replace batteries: Pull handle base down and replace with AA Alkaline Batteries only! Package Includes: 2AA Alkaline Batteries. Crest Spin Brush Classic for a better spin on clean. Made in China.