The Contact Key – Morse Code Key for Physics Lab is an educational electrical instrument designed to demonstrate the basic principles of electrical circuits and Morse code communication. It is used to make and break an electrical connection manually, producing short and long electrical signals that represent dots and dashes in Morse code. This apparatus helps students understand the fundamentals of electrical switching, circuit operation, and telegraph communication. It is ideal for practical demonstrations and experiments in school, college, university, and educational physics laboratories. Its simple design makes it easy to operate and suitable for teaching basic electrical communication concepts.