Coin operated self-service KTV is a self-service karaoke entertainment device. It provides users with the opportunity to sing and entertain in their private space. Users can purchase a certain song duration by depositing coins or using other payment methods, then choose their favorite song and sing on the equipped microphone. Coin operated self-service KTVs are usually equipped with audio equipment, display screens, and song selection systems, providing various song selection and lyrics display functions. Users can enjoy the fun of singing alone or with friends in a private space according to their preferences and needs. Coin operated self-service KTV devices are commonly found in shopping malls, entertainment venues, bars, and other places, providing users with a convenient and personalized entertainment choice.