PERFECTPRO ROCK PRO Mode D'emploi page 21

Keep rubber covers closed
Please always close rubber covers (SD, USB, AUX-in socket) on the
side of the radio when these input sockets are not in use. This is to
prevent moist and dust from entering the radio. This will also enhance
overall sound quality.
Note:
Rubber cover of the SD socket can best be closed when in use with a
SD card. For the USB socket it is advised to use the included silicon
USB cover when using a USB stick.
Note:
In dusty and moist conditions! When using the radio with a USB stick
plugged into the radio in dusty or moist conditions, always use the
rubber USB cover to shield and protect the radio and the USB stick.
Also make sure all other rubber covers are closed in these conditions
Charging MP3 player or mobile phone during
the playback
RockPro is capable of charging a MP3 media player or mobile phone via
USB slot when the radio is in Aux In mode.
Note:
The USB slot can offer 5V 0.5A power to charge external device by
AC power and 5V 0.25A by battery power. It is recommended to use
AC power to power the radio while charging MP3 media device or
mobile phone via USB slot. Battery is also able to charge the device,
however using the battery to charge the device will consume much
energy and drain the battery easily.
The USB charging may not support the entire iPod and iPhone range.
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