The T-fal Optigrill XL's "Automatic Sensor Cooking" technology immediately detects the number of items placed on the grill and their thickness in order to adjust the temperature and cooking time automatically. An indicator light allows cooking progress to be monitored directly: Blue then green at the start of cooking, then yellow when the food is rare, orange when it is medium and red if you like your food well done. Manual mode with four temperature settings to grill a variety of fruits and vegetables.