Good to know: - It's powered by 2 x AA batteries so there's no need to worry about finding a socket when you're traveling. - The integrated timer on this toothbrush reminds you to switch areas every 30 seconds, so you don't miss a spot. - The green bristles turn yellow when it's time to replace your brush head. - It removes up to 100% more plaque than a manual toothbrush. ORAL B ORADB5BK Battery Electric Toothbrush - Black, AA batteries, Includes 1 brush head, 1 brushing mode, Timer function