Description: Frequence: 1.7MHz Powered by 2 AA batteries(NOT included) Ultrasonic Toothbrush + 3 Brush Heads Three brash-heads inside that you can use nine months. Functions: -Elimination of tartar -Whitening teeth -Disinfection & elimination of inflammatory -Eliminate peculiar smell -Reduce bleeding of gum -Restrain atrophy of gum Warning: 1. People with heart pacemakers, please do not use this product, and it can not be near these people use. 2. Do not let children touch brush head standby. Placing the old brush heads carefullly. 3. Children (below the age of 12 years) and pregnant women, the prohibition of the use. 4. Although this product has waterproof and moistureproof function, but try to maintain dry environment. Package included: 1 x Ultrasonic Toothbrush 3 x Brush head Notes: 1. The colors may have different as the difference display,pls understand. 2. Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you bid.