... randomly playback voice 2.Support external up to 32G SD card, and USB disk MP3 voice module,sound ... module, electronic module Features1. Singel chip2. Support USB and SD card, USB disk priority, if have not USB disk ... , it will read SD card automatically.3. 5 buttons, one SIP Slave ... 8~320Kbps audio files6. Support external up to 32 G byte SD card, and USB disk7. With key mode and ...