1. Connect the defibrillator to the phone 
   
2. Open the Defibrio app by tapping this icon, then tap “Emergency“
   
3. Call 911 if no one else has
4. Return to the Defibrio app
5. Remove clothing covering the chest area and apply pads
6. Follow app instructions to check heart rhythm and administer shock if needed
7. Provide CPR as the app instructs

See the “Setting up the Defibrio device and mobile app“ section for complete instructions.