The Innosonian America-S13109 Clicker Actuator is an essential OEM replacement component designed specifically for the internal chest compression mechanism of the Brayden Adult CPR training manikin series. This mechanical actuator triggers the audible "click" sound when compressions reach the AHA-recommended depth of 2 to 2.4 inches (5 to 6 cm). By providing immediate auditory feedback, this component helps students establish and reinforce correct compression depth during Basic Life Support (BLS) and Advanced Cardiac Life Support (ACLS) practice. Replacing a worn or damaged clicker actuator restores clear sound feedback and ensures reliable performance across high-volume training courses.