1) It works with 3.6V Nicd/NiMh rechargeable power battery.
2) Waterproof design.
3) Quick charger or slow charger for your choice.
4) Three types brushes head to help you do body cleaning.
5) A whole set include one body, three types brush head, a charger and a battery.
6) 1736times testing which works out the most proper round times per minute to ensure cleaing effection but no damage to the skin.