MIC: Internal microphone, activated when you are in hands-free mode, during a phone call.
ON/OFF: On and off the button for the device.
PREV/V-: Previous song and decrease volume button.
NEXT/V+: Next song and increase volume button.
PLAY/PAUSE: Start or pause playback.
MODE: Button to toggle between different device modes.
*Modes available on your Razz Speaker: Bluetooth, FM Radio, Auxiliary and Micro SD.