Bluetooth wireless Microphone and speaker 2 in 1, can work independently without extra connection. Built-in lithium battery 2600mAh Battery for up to 8 hours of Singing, Enjoy KTV Karaoke effects with the Smartphone APP. High compatibility, fit for iOS and Android smartphones, iPad tablet, bluetooth connection. Multipurpose:Bluetooth speaker, Karaoke singing, Car Stereo, instrument recording, interviews, podcasting, etc. Ideal for all vocal applications from singing to speech and usable as bluetooth speakers.