Hensel Certo 400 Monolight - Manual (Page 39)

Operating the device
39
Activating and deactivating the “Audio” function
With the “Audio” function, flash readiness after charging or after a
reduction of the flash energy is indicated by an acoustic tone. To activate
the “Audio” function, proceed as follows:

Press the AUDIO button.
The LED display next to the AUDIO button lights up green.
To deactivate the “Audio” function, proceed as follows:
 Press the AUDIO button again.
The LED display next to the AUDIO button goes out.