electrical device power power button remote control switch off switch on appliance beginnings circle circles circular coil coiled coils components connected connections curved curves disconnected edged edges efficiency electrical-device electrical-part electricity ends equipment exposed fixture grille heating home-appliance internal linked links metal parts patterned patterns perspectives rims round rounded serrated serrations sharp stove-top surface surfaces symmetrical symmetry technology uncovered wired abstract background backgrounds board capacitor card chip circuit close-up closeup communication component computer connection data detail device digital electric electrical electronic electronics engineering green hardware high industry information integrated macro micro microchip modern mother motherboard network old part pattern PC processor science semiconductor server system tech wallpaper billies billy conserved-heat container convenient cooking-device durability durable economical efficient fuel-minimises fuel-minimizes handles heat-loss-minimised heat-loss-minimized heat-retention ice-cooler inner-pots insulated insulation keeps-flavour less-evaporation lids non-electric pan picnics portable portable-oven pot pots retained-heat retains-nutrients rice-cooker safe safer sauce-pan slow-cooker spill-proof stainless-steel strong thermal-cooker thermal-cooking thermal-insulation thermos-vacuum travel vacuum-cooker vacuum-flask water-saver zero-energy-use