Specification:
Color: black
Material: ABS + metal
Voltage: DC 5V
Installation pitch: 92 mm wide
Installation hole: 83 x 20 x 38 mm
Overall dimensions: 107 x 25 x 38 mm
(W x H x D)

Buttons operation:
1. VOL-button (previous song / turn down volume): in MP3 state, short press VOL- is to change to the previous song, long press to turn down volume; in FM state, short press to turn up a channel.
2. AUTO button (play / pause): in MP3 state, short press AUTO is the play / pause; in FM state short press is the play / pause, long press to automatically receive and keep channels.
3. VOL + button (next song / turn up volume): in MP3 state, short press VOL + is to change to next song, long press to turn up volume; in FM state, short press to turn down a channel.
4. MODE button: switch in turn in USB / SD / FM / AUX.
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Packing List:
Car MP3 Decoder Board *1