Avoid immersing fully in water. Not intended for children under 3. This is not a toy. Brush head is NOT replaceable. This brush contains non-replaceable batteries designed to last the lifetime of the brush. Dispose of product separately from household waste. Remove battery before discarding. Return to designated waste collection point for electrical equipment and batteries. If experiencing difficulty removing battery please consult an independent qualified professional or for more information visit our website www.wisdom-toothbrushes.com.