chiliGREEN HMC-3903 - Manual (Page 20)

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2.2 Front Panel
No. Name Function
1 REC indicator Indicator turns on when recording starts.
2 ERROR indicator Indicator turns on when card copy or music playback
is failed, press any button to turn it off.
3 COPY indicator Indicator turns on when card copy starts.
4 MUSIC indicator Indicator turns on during music playback.
5 POWER button Press to power on/off.
6 USB HOST port x 2 Connecting to USB mass storage device
7 USB DEVICE port Connecting to computer
8 4-In-1 card slot Compatible with 4 types of memory cards.