Digital audio mixer - 112 kinds of electro-acoustic, 18 kinds of sound effects and 6 effect modes 7 kinds of connection methods - Karaoke live via one mobile phone; Live broadcast via two mobile phones; Live broadcast via 3 mobile phones; Synchronous live broadcast via mobile and computer; Live broadcast via one computer; Computer for accompaniment a Reverb size adjustment + microphone volume adjustment + High and low sound adjustment + Recording volume control + Volume control (earphone function).