Equipped with Bluetooth】Connects to almost all smartphones, tablets, and Bluetooth-enabled devices! Compatible with Apple and Android OS. Connecting is very easy, and once connected, it will automatically connect the next time, saving you the hassle. Of course, you can also use it by connecting a cable to your smartphone or audio player without connecting to Bluetooth. 【High-Quality Speaker & Voice Cut Function】Equipped with a high-quality speaker and a reverberation function, adding overwhelming realism to the music. The voice cut function cuts out the vocals in the song, leaving only the accompaniment, perfect for karaoke practice! *Not all song vocals can be removed. Depending on the pitch and vocal quality of the song (especially low tones), it may not be possible to remove them. 【Duet Mode for Fun with Two People】By pairing two microphones to one smartphone simultaneously, you can enjoy karaoke with friends and family!