1. Weight: 225 g 2. Material: food grade silicone + PP 3. Size: Children's brush head: 4 x 3.8 x 1.2 cm, Children's brush head: 5 x 4.4x 1.4 cm 4. Charging time: about 120 minutes 5. Power supply method: USB charging 6. Maximum power: 5 w 7. Applicable age: 3-7 years old, 8-15 years old