What does that mean to the everyday user? Not much. Most household electrical devices will run perfectly fine on either type of wave form. Most of our customers who are using a power Inverter Pure Sine to run a laptop, a/c cell phone charger, fan, or camera find that a modified-sine wave power Inverter Pure Sine that operates through the cigarette lighter socket the easiest to use. We usually suggest choosing power inverters that are rated under 300 watts when using the 12-volt cigarette lighter socket found in most vehicles. We suggest this because after reaching 300 watts of draw on the Inverter Pure Sine, the fuses in your car will begin to blow. The (about $35.00) is a great choice for dashboarders who would like an easy solution to power their devices. It has only one outlet, but since plugging it into a 12-volt socket is all that is required for operation, it can’t be beat for ease of use. This little Inverter Pure Sine can supply 140 watts of continuous operation and has a built-in surge protector.