Brush heads for electric toothbrushes for healthy teeth and gums. Universal compatible model. The color indicator on the bristles will fade when it's time to replace the brush head. Dentists recommend changing the brush head every 3 months.| Not suitable for children under 4 years old. Children up to 8 years old should use it under adult supervision.|| Divide your mouth into 4 quadrants. Position the toothbrush over and along the sides of each tooth, allowing the toothbrush to do its job without applying pressure. Follow this procedure, changing quadrants every 30 seconds. It is recommended to brush for at least 2 minutes.