Replaceable brush head. Whitens teeth in 1 week (by removing surface stains). 2 minute timer. 5x plaque removal (5x more plaque removal along the gumline vs. an ordinary manual toothbrush). Tough on plaque gentle on gums. Designed with you in mind: Slim, lightweight handle designed for easy control. Brush with sonic vibrations of 20,000 strokes/min. Replaceable brush head. This toothbrush is compatible with any Colgate 360 degrees advanced replacement brush head. Satisfaction guaranteed or your money back U.S. 1-800-468-6502 https://wwwcolgatepalmolive.com/en-us/contact-us. Includes 2 AAA batteries. To Replace Batteries: Firmly hold the bottom of the handle while rotating the top counter-clockwise. Insert 2 new AAA batteries as indicated inside the brush handle and firmly rotate clockwise back into position to close. www.colgate.com. Save water turn off the tap while brushing. Made in China.