Utilises push button, which offers a hygienic solution for multiple operators. � Includes an LED light for optimal use � Ultra slim body design � 4 cell batteries, 1 distinct tone � Sound Power: 110 dB WARNING - KEEP BUTTON BATTERIES OUT OF REACH OF CHILDREN � Swallowing may lead to serious or fatal injury in as little as 2 hours, due to chemical burns and potential perforation of the oesophagus. � Never allow children to replace button batteries of any device. � If you suspect your child has swallowed or inserted a button battery immediately call the 24-hour Poisons Information Centre on 131126 (Australia) or 0800 764 766 (New Zealand). � Regularly examine devices and make sure the battery compartment is correctly secured. � Dispose of used button batteries immediately and safely out of the reach of children. A battery can still be dangerous even when flat.