The wattage output of the Frigidaire FMV157GS 0.5 CuFt Over-The-Range Microwave Oven is 1,000 watts.
The GE Spacemaker II JEM25DMBB 1.0 CuFt Countertop Microwave Oven has a 800 wattage of cooking power.
See chart on this website http://www.microwavecookingforone.com/Charts/Wattage.html
The wattage of the GE Profile Spacemaker PNM1871SMSS 1.8 CuFt Over-The-Range Microwave Oven is 1100 watts.
600 Watts
600W
To determine the wattage of a microwave, look for a label or sticker on the back or inside the microwave's door. The wattage is usually mentioned in terms of "W" or "Watts" and may range from 600W to 1500W or more.
Although there is no set standard, most recipes are tested with a 1000 Watt microwave. If your microwave has less wattage, add 10% more time per 100 Watts lower to the recipe. This should be about the time needed to cook the recipe properly.
1100w
The best mountable microwave oven is the one that best suites your needs. Some of the things to take into considerationa are: 1.) the higher the wattage the faster things cook, 2.) The more space in the microwave, the bigger things you can cook, and 3.) the less wattage and less space, the cheaper the microwave can be.
It is printed on the label and may also appear on the front.
The Daewoo KOR-6L0B is a low watt option.