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No option selection required as it comes with different head adapters.
Sorry, there was a problem. Please try again later.The Complete Care 5.0 features a sonic toothbrush and the Complete Care 5.5 features an oscillating/rotating toothbrush. Check out this link to a comparsion sheet to the two units: https://www.waterpik.com/oral-health/products/compare/WP-811/WP-861/
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