Sony HVL-F42AM - Manual (Page 15)

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15 GB
Power save
When the camera or flash unit is not used for three minutes, power switches off and
display panel indicators go out automatically to save the batteries.
• In wireless flash photography (page 36), control panel indicators disappear after
60 minutes.
• You can change the time until power save, or disable power save. (page 44)
• The power of the flash unit is turned off automatically when the POWER switch
of the camera is set to OFF.*
* When Sony digital single-lens reflex camera (other than DSLR-A100) is used.