1. Material: ABS, stainless steel 2. Battery capacity: 1500mAh 3. Battery life: about 3.5H 4. Charging time: about 3.5H 5. Working frequency: 37-44KHz 6. Working voltage: 3.7V 7. Output power: 2.5W (max) 8. Built-in intelligent identification chip, high-frequency vibration on hard teeth, no vibration on soft gums 9. Adopt Type-C charging interface, convenient and fast 10. Built-in 1500mAh high-capacity battery, long battery life 11. Two kinds of cleaning heads, targeted to solve dental problems