New Packaging A replaceable head, manual toothbrush, with two key dental maintenance features built into the handle - it makes a dramatic improvement in the condition of gums. Intelligent - soft or medium. * 2 minutes timer -- toothbrush beeps once and green light flashes once every 30 sec. to 2 minutes. * 90 Day wear meter - after 180 uses the light changes to red to indicate time to check bristle wear. Depressing the button for 5 seconds resets the meter to zero. * Replaceable heads - reduces environmental impact. * Radial bristling - first toothbrush in the world to have it. Makes brushing easier and more effective. * Right or left hand option -- reversible handle * 5,000 bristles - available in soft or medium. * The tiny batteries will last for over 6 heads worth of regular use -- we recommend that users return the handle to us for recycling.