I have never sung here. Operation confirmed. Use it in cars, parties, etc. No code provided. 【High-Quality Karaoke Microphone】The MetFut karaoke microphone boasts a portable design and outstanding audio performance, providing a comfortable karaoke experience. With a built-in high-quality speaker, no initial setup is required, allowing you to start karaoke smoothly. It adopts the latest Bluetooth 5.0 technology, achieving a stable wireless connection. When singing, there is no delay, sound skipping, or sound interruption. While collecting your voice, it also suppresses surrounding noise to some extent. With just one MetFut karaoke microphone, you can enjoy immersive karaoke. Note: We recommend using a karaoke app to sing karaoke with songs that have had the vocals removed. 【Earphone Monitoring Possible】You can maximize the speaker volume and share the joy of karaoke time with family and friends. Also, for those living alone or practicing karaoke, you can use 3.5mm earphones to monitor the sound and enjoy karaoke without disturbing others. 【Duet Mode and Echo Function】By pressing the duet button, you can easily synchronize two karaoke microphones, allowing two people to sing karaoke simultaneously. Furthermore, the main unit is equipped with an echo adjustment function, allowing you to enjoy karaoke as if you were in a karaoke parlor. 【Quality Craftsmanship】An integrated karaoke microphone with attention to detail. The high-quality leather handle is easy to grip and resistant to dirt. A 3000mAh rechargeable battery is built-in, allowing for up to 10 hours of continuous playback with a charging time of about 3 hours. A durable PU storage case with a hook is included, making it easy to carry and store. 【Portable Design】It is active in various scenes, whether indoors or outdoors, such as indoor gatherings, outdoor activities, karaoke practice, in the car, and travel. It also has volume adjustment, recording, vocal removal, and TF card playback functions, making it high-quality and versatile, and an ideal gift for karaoke lovers. Multi-functional wireless karaoke microphone with a leather handle.