Ключевые слова: adapter, analogue, appliances, arm, automatic, automation, background, button, circle, clock, closeup, concept, connection, control, device, digital, disconnected, efficiency, electric, electrical, electricity, energy, equipment, hand, holding, isolated, modern, numbers, object, off, plastic, plug, power, round, set, sign, socket, stop, switch, symbol, technical, technology, time, timer, turn, turning, universal, voltage, white, wireless,