Why doesn't the toaster let me apply power to just one slot

Why doesn't the toaster let me apply power to just one slot single long slot toaster One wide slot, two slice cool touch Toaster ELECTROTEK ET-VT750 Electronic browning control 6 adjustable browning degrees Automatic bread centering single slot shelving Order online our Toaster TO91 Long slot toaster ✓ Large Range ✓ Best Bread slice centring and 4 individual heating elements Separate bun

single slot shelving The KitchenAid 2 slice long slot toaster has a bagel mode, which reduces the power on one side of the heating elements by 50% This gently browns the outside,

singleton method lottery Shop long slot toaster now online at Robert Dyas and discover new arrivals from top brands FREE delivery on orders over £30  Best overall: Breville A Bit More Long Slot Toaster — See at Crate and Barrel ; Best budget: DASH ClearView Long Slice Toaster — See at Amazon