Maruman Sonic Vibration Toothbrush Pro Sonic MAX Soft Blue DH220 BL 2 sets + 4 replacement brushes The set includes a total of 2 main units + 6 replacement brushes. High power like a rechargeable, despite being battery-operated Ultra-powerful sonic vibration of 40,000 strokes per minute. Experience a refreshing and smooth feeling that you can't get with hand brushing. ● Easy-to-press and easy-to-understand ON and OFF independent switches. ● Ultra-fine bristle brush thoroughly cleans between teeth and gums. The ultra-fine bristles enter the periodontal pocket and remove plaque with sonic vibration! ● Easy brush replacement. The replacement brush should be replaced within 3 months. Even within 3 months, replace the brush if the bristles start to splay. ● Uses 2 AAA batteries (sold separately)