Philips HeartStart Onsite Defibrillator is vital life saving device that can be used by virtually anyone in an emergency. Help bring someone back from the brink in three simple steps: pull back the handle, put the pads on the patient's chest, and press the flashing orange button. A voice instructs you through the process as well. The HeartStart Onsite Defibrillator tests itself daily, so it's primed to use during a crisis.