I accidentally bought two of these. I haven't sung with it at all, but I charged it to check if it works. Operation has been confirmed. Please use it in your car, at parties, etc. 【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 uses the latest Bluetooth 5.0 technology for a stable wireless connection. There is no delay, skipping, or sound interruption when singing. While collecting your voice, it also suppresses surrounding noise to some extent. With 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 share the joy of karaoke time with family and friends by maximizing the speaker volume, or you can enjoy karaoke alone without disturbing others by using 3.5mm earphones to monitor the sound, which is great for those living alone or practicing karaoke. 【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. It has a built-in 3000mAh rechargeable battery, which allows for up to 10 hours of continuous playback with a charging time of about 3 hours. A sturdy PU storage case with a hook is included, making it easy to carry and store. 【Portable Design】It can be used in various situations, whether indoors or outdoors, such as 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.