Emerson 8991SB uses omni wave cooking system promotes faster and more uniform cooking by using removable glass turntable for complete, even cooking. It has 10 different power levels along with 6 pre-programmed recipes and speedy cook option (30-sec. Intervals steps up to 5 mins. Full power). Emerson 8769B has 12/24-hour clock system and 59-minute, 99-second digital timer and also it has time defrost function. This microwave has Child-safe lock-out feature so it safe to have it in you house regardless of child or not and also this is Ul listed. Eight one touch Settings; Popcorn, Beverage, Potato, Pizza, Frozen Vegetable, Baby Milk, Fresh Vegetable, Dinner plate