Transformers Firefly Ready Go Lightup Timer Toothbrush

Kids light up timer toothbrush with soft bristles suitable for 3 years and above.How to use?Start when the green light flashes and brush for 30 seconds, when the red light flashes its time to stop and repeat on the second row of teeth. Brush twice per day.Batteries included (non replaceable). When light no longer flashes its time to change your brush (approx 3 months).