1. Compatible with various devices It supports Bluetooth 5.1 and wired connection, so you can enjoy karaoke on various devices including smartphones. The bottom of the microphone is equipped with a 3.5mm earphone jack, which allows you to listen to the sound of a mixture of karaoke and singing voice with your earphones / headphones, making it ideal for karaoke practice at home. 2. Karaoke Effects concert, baby sound, monster sound, KTV sound effects, acoustic sound. Microphone and speaker volume can be adjusted. Push button Switch to eliminate the original sound, the original song can be switched to accompaniment mode. Proprietary DSP processing, independent control of reverb, delay and spike suppression. 3. Versatile outputs and controls Singing:one handset connected to two microphones for duet singing.When not singing: it can be used as a dual Bluetooth speaker. Proprietary DSP processing with independent control of reverb, delay and shrill suppression.Independent control. Professional recording output interface for live streaming. 4. USB-C Fast Charging Support Support USB-C fast charging and 15 minutes of charge will last for about 1 hour.