*The design of the Double reverberation and with USB player;
*Professional ECHO+REVERB system;
*Stand long time to operate,high temperature,dry and unstable   voltage;
*With more mellow voice by the circuit technique;
*Hide voice quality to adjust switch;
*Max power output;
*Auto or manual check VOD signal source;
*Automatic memory setting of the microphone and music volume;
*Setting the max volume switch to protect System.