18,000 Sonic Pulses Per Minute - Small but POWERFUL!nHigh Quality DuPont Bristles.nWill last over 120 days on 1 AAA battery when used for 2 minutes everyday!nWATERPROOF - easy to clean.nPowered by 1 AAA battery (not included)nThe perfect sonic toothbrush to take anywhere! Perfect for travel and everyday use on the go: You will barely notice this toothbrush in your pocket or purse but you will be happy you have it after lunch! Powerful sonic pulses and high quality DuPont bristles will keep your mouth fresh and clean!