Oral-B, 3D White, Replacement Brush Heads, 2 Brush Heads

How to replace your brush head

1. To Remove: Place enclosed QuickRelease tool on the neck of toothbrush as shown and press (A), then slide brush head off (B). 
2. To Replace: Lay new replacement brush head parallel to neck of toothbrush (C), then slide toward handle until lock clicks into place (D). Check that brush head is firmly attached. Do not insert brush head at angle (E).

Replace head brush every 3 months or sooner if brush head becomes loose due to damage.