Ricoh GF-1 - Manual (Page 10)

EN - 
Turning off the flash
1 Keep the ON/OFF button pressed for about 2 seconds to turn
off the flash.
Power saving mode
To save battery power, the flash unit will automatically enter
stand-by mode about 2 minutes after the camera's Auto Power
Off is activated. In stand-by mode, the PILOT lamp blinks in red
every 2 seconds.
If you operate any of the buttons on the flash unit, or if the
camera is turned on, the flash will automatically wake up from
stand-by mode.
If the flash unit is left in stand-by mode for 30 minutes, the Auto
Power Off function will be activated and the flash will be turned
off completely. To use the flash in such case, turn on the power of
the flash unit again.
* In slave mode the flash unit will not enter stand-by mode and
the Auto Power Off function will be activated only after 60
minutes.