Wireless microphones are devices that capture sound without the need for cables. They use radio waves to transmit audio signals from the microphone to a receiver, allowing for greater freedom of movement. This technology is commonly used in live performances, presentations, and broadcasting, making it easier for speakers and performers to engage with their audience. These microphones come in various types, including handheld, lapel, and headset models. They often operate on different frequency bands, which helps to minimize interference from other electronic devices. Popular brands like Shure and Sennheiser offer reliable options for both professionals and casual users.