Modified Sine Wave Inverters offer an economical means of providing AC power from a 12 VDC source and are suited for most uses. Pure Sine Wave Inverters provide an output voltage wave form that has a true sine wave with very low harmonic distortion and clean power like utility-supplied electricity. These Inverters are more suited for sensitive electrical or electronic items such as laptop computers, laser printers and certain specialized applications such as medical, communications and military equipment.