Karaoke For EveryoneThis is a great karaoke machine for adults and children. The stereo system has 2*15W tweeters placed on both sides of the speakers, providing high-fidelity audio wherever it is played. It's also a portable PA system for outdoor parties! This is a perfect birthday gift for children and adults. Update Optical and Coaxial Connect The optical or Coaxial option is available for TV and amplifier connection which to enjoy an ultimate home karaoke machine all in one system. It also supports all kinds of simple connections such as Bluetooth 5.0/3.5mm Aux In/USB Drive/TF Card with many external devices such as iPhone, Android phone, iPad, TV, PC, etc.It can be used as a Bluetooth music speaker, for meetings, home theater, etc. Attention: optical cable is not included in the package. Touch-key Design Long-lasting battery lifeThe touch key design allows the Karaoke machine to be free of physical buttons, giving you smoother control while the speakers have a more integrated and smooth appearance. The speaker is equipped with a 4000mAh rechargeable battery which lasts for up to 3.5 hours. The speaker can be used as a charging station for the microphone, which makes it easier to charge them simultaneously. Multiple modes for more fun: The SINWE Karaoke machine can turn sound field effects into Standard, pop music, Rock music, classical music, Treble, Bass. Also equipped with voice changer function, can become male voice, female voice, baby voice. And there are two sound field mode (KTV/Concert). An ideal gift choice for your kids who fall in love with performance and music for speech or singing.