6On/Off Switch and Flash Test OperationTo switch on the flashgun, slide the power switch to "ON"position. The "READY" indicator will light up as soon asthe flash is ready for shooting. Press the Test button toensure the flashgun works properly.If the flashgun discharges completely, wait until the"READY" indicator glows again. To switch off, slide thepower switch to "OFF" position.Illumination of LC DisplayLC display is used to show general information of thecamera and current status of the flashgun. LC display willbe illuminated for about 5 seconds every time the "LIGHT"key is lightly tapped.ShootingAutomatic Flash Sync Speed ControlWhen the flashgun is ready, the camera will automaticallyadjust flash sync speed from program mode oraperture-priority mode selected. The sync speed dependson camera model and usually ranges from 1/30 sec to1/250 sec. When a shot has been taken, "OK" symbolflashes shortly on the LC display to confirm correctexposure.