"Product DetailsSuitable for: Kids Material: Synthetic (upper, lining and outsole) Battery information: Requires a non-replaceable battery (included) FeaturesLace up design with elastic laces Light up outsole Adjustable strap with touch fastener closure Round toe Additional InformationButton battery safety information Note: The battery life is subject to wear and tear and does not affect the wearing performance of the shoes Warning: Button Cell Batteries are Hazardous (new or used). Keep away from children. Button Cell Batteries can cause severe or fatal injuries in 2 hours or less if they are swallowed or placed inside any part of the body. If you suspect your child has swallowed or inserted a button cell battery, call the 24-hour Poisons Information Centre in Australia on 131126 or in New Zealand on 0800 764 766 or contact your country's emergency department."