Philips VTR5500 Manual page 59

" " to select. The system default sound source is microphone.
For choosing sound source please refer to the below picture:
If choose the radio channel as a REC source and there are
saved channels in the system, the below interface will show; if
there's no saved radio channel in the system, the system will
notify that no saved channel available, and set the channel at
94.2MHZ as default.
Channel 1, channel 2, channel 3 are saved channels. Select
the one you want to record, then press MENU button to confirm.
At the time of recording, make sure to have the earphones
connected to the device to enable radio reception.
The third function is the recording duration. You can set the
recording duration to 30, 60, 120 minutes or infinite. The
recording duration setting as follows:
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