1.10 years up.
2.Slim and Light for all family members.
3.Soft Dupont Bristle
4.Change toothpaste to bubble by microburst technology.
5.22,000 strokes per minutes.
6.Rubber hand grip for anti-slip
7.IPX7 level water proof system.
8.Ultra light 23gram weight
9.Long Hand grip as 20cm and slim, ergonomic design of hand grip.
10.just one AAA battery for 5 months.
