C1: light wave and microwave heating alternately with each other, the microwave oven's efficient penetration and high surface temperature of the light wave can be grilled thicker food, the grill function can make the grilled food crispy skin. c2: compared to C1 only the heater and the microwave heating time ratio is different. c2's light wave heat and time are a little bit longer than the C1.

G: is pure light wave, in the heating time tight heating tube (light wave tube) heating to cook the food, but because the light wave penetration is not strong surface temperature relative to the microwave is higher, so it is generally only suitable for baking slices of bread, sausage and other thin food.