ATM6000BT      Piano finish black USB/SD input      BT function      Dual microphone inputs with       VOL & ECHO control      MP3 input & headphone output VFD display

ATM6500BT      USD/SD input      BT function & FM tuner      Dual mic inputs with bass & delay & echo & treble controls       VFD displayRemote control

ATM7000USB-BT      USD/SD card input     Bluetooth & FM tuner function      brushed aluminum panel       Two microphone inputs with vol& tone &       ECHO controls    VFD display      Remote control

SF-720        Microphone input with individual volume controls      USB/SD inputs       Microphone BAL/ECHO/LO/MID/HI conctrol       Display window for auto signal input view  Master volume knob for control music voice

SF-460      Professional public address amplifier      USB/SD card inputsTreble & Bass control      Output zone selecto

SF-31       USB/SD card Input      Play/Pause & Previous & Next Control      Input Selector for AUX/USB/SD/CD