Categories thumb|50x50px|Microwave-safe symbol Domestic microwave ovens are typically marked with the microwave-safe symbol, next to the device's approximate IEC 60705 output power rating, in watts (typically either: 600W, 700W, 800W, 900W, 1000W), and a voluntary Heating Category (A-E).
Categories thumb|50x50px|Microwave-safe symbol Domestic microwave ovens are typically marked with the microwave-safe symbol, next to the device's approximate IEC 60705 output power rating, in watts (typically: either: 600W, 700W, 800W, 900W, 1000W), and a voluntary Heating Category (A-E).