Don't fully functioning microwaves chuck out a shed loads of crap on the 2.4Ghz range anyway? Everytime we use ours it kills the cordless phones, tv sender and my wireless lan, good job it only takes one minute to cook a burger!!
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They cook on the 2.4Ghz range, ideally you don't want any leakage as you want that energy to heat what's in the oven not outside it - there are recommendations of the amount of leakage. As the oven gets old the leakage can increase.