It works with Bluetooth technology, and it is often the WS-858 model. This microphone features many built-in functions. Main features: Functions: It works as a microphone, Bluetooth speaker, MP3 player, voice recorder, and sometimes an FM radio. Connection: Connects wirelessly to smart devices such as mobile phones, tablets, and computers via Bluetooth. Sound effects: Includes control buttons to adjust the volume and reverb. It may also have fun sound changers like child, male, or female voices. Design: Features a lightweight and comfortable design with a metal mesh and an aluminum alloy handle.