The Sharp R20 is a 750 watt .7 cu.ft (20 liter) compact microwave that is space concsious, energy efficient, but does not give up on the power needed to heat the items needed.  The Sharp R20 Microwaves boast 750 watts of MWO power and it means it.

750 watts of MWO Power
11 power levels
Time Defrost
2 stage cooking sequence
Dimensions:  44.2 cm x 25.5 cm x 32.7 cm  (  17.4 inches x 10 inches x   12.8 in)
Voltage: 220-240 Volts  50 hertz
Weight:  10.9 kg/  24 lbs