Eurotops 25158 Mode D'emploi page 21

While listening, simply turn the Frequency Controller dial until you achieve the
desired noise reduction.
 SOUND RECORDING:
The Art.No.25158 is equipped with a digital recording chip that can capture
approximately 60 seconds of sound.
To activate the recording function, simply push the RECORD button (Picture 4)
on the right side of the unit. A red LED light stays lit while the recording is
taking place.
To hear the recorded sound, press the PLAY button. (See Picture 4). The
sound will be heard through the headphones.
When you push the RECORD button again you will lose any previously
recorded sound.
(Picture 4)
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(Picture 3)