Multi-Function KozyOne Karaoke machine can turn your home into your own karaoke house, brings fun to your kids and families. It can also be used as a 16W powerful bluetooth speaker, And the hands-free calling function allows you to answer/reject the incoming calls directly from the machine. It also comes with 4 input methods: Bluetooth/USB/TF Card and Aux, whicn means you can always play your favourite music on it. Perfect for family gatherings, parties, picnics and more.2000 mAh Battery & 16W Speaker Built-in 2000 mAh large capacity battery, 2-3 hours charging provides 5-6 hours working time. It also comes with powerful 2 x 8W speaker, brings loud, clear and high quality sound effects..Wireless MicrophoneUnlike other wired karaoke machines on market, we provide wireless microphone on our product. No need to pair, simply turn on and play. With the stable connectioned wireless microphone, you can sing and walk freely.11 Modes RGB & Voice Changer There are 11 RGB light effects, including quick, slow, jump, flash, etc. Each lighting effect can bring you different moods. This karaoke machine also have voice changing functions, can turn your voice into different tones for more entertainments, including: monster voice, male voice, female voice, and baby voice.