The main parameters of microwave ovens: the volume of the working chamber is usually from 17 to 44 liters; standard power - 700–1000 W - the higher it is, the higher the cooking speed.
In the microwave, you can bake, fry, heat and defrost. Ease of cleaning (bicerramic enamel, enamel, stainless steel) will depend on the quality of the coating of the inner chamber.
When choosing a built-in microwave oven, pay attention first of all to the dimensions. Width, depth, height - all these parameters can vary quite noticeably.