VOLUME: master volume switch: In the play U disk SD card FM to control the volume.
MIC ECHO: Microphone Reverb: Reverb control the microphone input volume level.
MIC VOL: mic / guitar volume switch: In the microphone and guitar inputs control the volume size.
GUITAR IN: guitar input.
LOW BATTERY CHC: Battery indicator: when the battery voltage is lower than 4.3V higher than 8V above the red light green light.
MIC IN: microphone input.
MODE: mode switch (AUX / FM / USB / SD Card) boot no equipment is AUX state、 press Yes FM state、 when the switch with USB and SD sequence USB / SD / FM / AUX、 (USB / SD support inserted after priority)
: Reading USB / SD when on one、 FM time on a radio station.
: Reading USB / SD time for the next one、 FM when the next station.
: Reading USB / SD when play / pause、 FM、 short press the automatic search radio stations.
LED: single color (red) USB / SD playback pause flashes lit、 FM、 Always searching flashes、 AUX lit.
LED: color (red、 green) is less than 4.3V during playback when the red light、 a green light above 8V.
USB: Access U disk SD / MMC: SD card access
AUDIO: external audio input
DC IN: Access 9V 1A
ON / OFF: switch key、 press down the boot、 playing up is off.
Dimensions: 6.69 in x 2.36 in x 1.57 in (17.0 cm x 6.0 cm x 4.0 cm) Weight: 3.00 oz (85 g)