Bluetooth devices are wireless gadgets that use short-range radio waves to connect and communicate with each other. They allow users to transfer data, stream audio, or control devices without the need for cables. Common examples include wireless headphones, smartphones, and smartwatches. These devices typically operate within a range of about 30 feet (10 meters) and can connect to multiple devices simultaneously. Bluetooth technology is widely used in various applications, from home automation to healthcare, making it a convenient choice for everyday connectivity.