just load the food into the tube cooking chamber and set the arc on the reflector to cook, no monitoring required. This solar oven preserves the flavor and nutrients of food cooked in 360 degrees (like a slow cooker - but faster). Material: metal+304 stainless steel Reflector size: 49cm*35cm (flexible reflective parabolic mirror) Food trough size: length 50cm, inner diameter 54mm Weight with package: 2.7 kg Vacuum tube air drying temperature: 150-300 degrees Vacuum tube size: outer diameter 70mm, inner diameter 55mm, length 620mm Vacuum tube capacity: 1.5L, about 2.2 pounds of food Package Contents: 1 set x portable solar grill Time for making food (for reference only when there is sufficient sunshine): Steak 20-30min； Popcorn 5-10min； Chestnut 15-25min；Seafood/egg 10-20min； Sunflower seeds/sausage/kebab 10-15min；Connecting flesh and blood 15-20min； Chestnut 15-25min；Steak/Bacon 20-30min；Rice/chicken wings/ sweet potato 25-40min；Egg 10-20min；Bread 20-35min