The Singing Machine  Pedestal CDG Karaoke System just got better. The STVG-999 not only surpasses its previous model, but now includes dual tower speakers. This machine will definitely provide you with many years of fun and entertainment. This unit has many useful features. One of them being Auto Voice Control (A.V.C.). When the A.V.C. function is activated, the vocals on a multiplex recording are eliminated as soon as the singer begins singing into the microphone. When the singer stops singing, the vocals on the multiplex recording are automatically re-activated. This useful function is used pimarily during practice sessions while a singer is learning a song. You'll be able to use key control, echo, and pitch control to fine tune the song to match the singers voice.The dual tower speakers will provide you with the extra sound performance to sing like a star. All this is paired up with one wired microphone and wireless microphone.