Using the flash, Wireless control function, Sync triggering – Godox TT600 Thinklite Flash User Manual
Page 14: Custom function----sleep function
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Master mode, groups can be selected from M/A/B/C/D/E; while in
 Slave mode, groups can be selected from A/B/C/D/E.
● As TT600 adopts Godox wireless X system, it is compatible with 
AD360II-C
、
AD360II-N
、
TT685C
、
TT685N
、
X1T-C
、
X1T-N
 wireless control, etc.
● See the picture below:
12. Wireless Control Function
● The flash unit is built in with a Wireless Control Port (6) so that
you can wirelessly adjust the power level of the flash and control
the on-or-off of your flash, focus assist beam and buzzer, as well
 as trigger the flash. 
● To control the flash wirelessly, you need a Godox FT 
series remote control set (on-camera and on-flash).
Insert its receive end into the Wireless Control Port
(6) on the flash and insert the transmit end
into the camera hot shoe. Settings made
on the hotshoe-mounted transmit and
receive ends will be
wirelessly communicated to
the flash. Then you can
press the camera shutter-
release button to trigger
the flash. You can also hold
the transmit end at hand to
control your off-camera
flash.
13.Sync Triggering
The Sync Cord Jack (7) is a Φ3.5mm plug. Insert a trigger plug here 
and the flash will be fired synchronously with the camera shutter. 
14. Custom Function----Sleep Function
● This product is equipped with
Sleep Function to avoid battery
 drain when the flash unit is idle. 
● Press <
> button and hold for 2
 seconds to enter the sleep 
 Function Mode. The LCD panel 
 displays “SL” (Sleep) and 
 “Sleeping Time”. Idle time before 
 entering Sleep Mode is 10 minutes 
 by default. Rotate Select Dial 
Using the Flash
● For full instructions on the use of FT series remote control,
see its user manual.
Transmission distance is 
about 100 meters