To start cooking first press the “Start” button on the iGuardStove which opens our gas valve and allows you to light your stove. After 5 minutes of not seeing any motion it shuts off the stove. To resume cooking simply press the “Resume” button on the iGuardStove which opens our gas valve allowing you to relight the stove. This will prevent burnt food and even worse…a kitchen fire. The best gas stove auto shut off device you can buy! Perfect for families dealing with Alzheimer’s, Dementia or Autism.