<P> The most commonly used methods to adjust heat supplied to the toast are either variable time or a heat sensor . </P> <P> Among pop - up toasters, those toasting two slices of bread are more purchased than those which can toast four . Pop - up toasters can have a range of appearances beyond just a square box, and may have an exterior finish of chrome, copper, brushed metal, or any color plastic . The marketing and price of toasters may not be an indication of quality for producing good toast . A typical modern two - slice pop - up toaster can draw from 600 to 1200 watts . </P> <P> In 2012 in the United States, a typical market price for a pop - up toaster was US $15 . </P> <P> Toaster ovens are small electric ovens with a front door, wire rack and removable baking pan . To toast bread with a toaster oven, slices of bread are placed horizontally on the rack . When the toast is done, the toaster turns off, but in most cases the door must be opened manually . Most toaster ovens are significantly larger than toasters, but are capable of performing most of the functions of electric ovens, albeit on a much smaller scale . They can be used to cook toast with toppings, like garlic bread or cheese, though they tend to produce drier toast since their heating elements are located farther from the toast (to allow larger items to be cooked). They take 4--6 minutes to make toast as compared to 2--3 minutes in pop - up toasters . Since the toast lies on bars in a toaster oven, the toast will have untoasted stripes on one side . The evidence from product testing does not indicate that convection oven toaster ovens perform better than regular toaster ovens . </P>

When was the first pop up toaster invented