What are the power output levels and what are they used for?

The microwave has five power levels: Low (17%) for softening ice cream, Med. Low/Defrost (33%) for soups, stews, and defrosting, Med. (55%) for stew and fish, Med. High (77%) for rice, fish, and chicken, and High (100%) for reheating, boiling water, and beverages. Turn the POWER knob to the desired level, then set the TIMER knob to your required cooking time. The oven will automatically start cooking once both are set. (Page 13)