Telephone

A telephone is a communication device that converts sound into electrical signals and transmits them over distances, allowing people to talk to each other in real time. It typically consists of a microphone to capture the speaker's voice, a speaker to reproduce the other person's voice, and a dial or keypad to select the number to call. Telephones can be wired (landlines) or wireless (mobile phones), and modern smartphones also offer additional features like texting, internet access, and various apps. Overall, the telephone has revolutionized personal and business communication since its invention.