Independently-controlled dual motors for vertically-recirculated air impingement, Top-launched microwave system, Stirrer to help ensure even distribution of air and microwave, Integral recirculating catalytic converter for UL (KNLZ) listed ventless operation, External air filtration, Vent catalyst to further limit emissions and odors, LED timer counts down last 30 seconds of cook time, Smart menu system capable of storing up to 256 recipes, Flash firmware updates via smart card, Single or dual-temperature interface, Field-configurable for single or multiphase operation, 240 V, 50/60 Hz, 1 phase