Designed for everyday heroes in extraordinary moments, the Philips HeartStart HS1 AED (M5066A) is ready for action and virtually ready to go. This device allows anyone, even with minimal training, to treat the most common cause of suspected sudden cardiac arrest (SCA) by delivering a swift and effective shock wherever SCA occurs. The HS1 automated external defibrillator provides real-time guidance through step-by-step voice prompts, from pad placement to performing CPR. When every second counts, Philips HeartStart HS1 defibrillator is your reliable partner, guiding you step by step.