Power Switch set to ON, and the flash will start charging (the charging indicator is dim). After several seconds, the charging indicator turns red and the flash unit is ready for firing. For a test flash, press the Test Button. After use, power off the camera flash by setting Power Switch to OFF. If the charging indicator blinks in every 1s, the battery power is low. In such case, the camera flash will turn off immediately. Replace the batteries immediately.
The camera flash has 8 steps of power output control which are indicated by 8 LED indicators. Press "+" to increase the power from 1/128, 1/64, 1/32, 1/16, 1/8, 1/4, 1/2 to 1/1. In contrast, you can press "-"to reduce the power output level.
Press Mode Selection Button to enter M mode. In this mode, you can set the flash onto your camera's hotshoe or trigger to fire flashes. During shooting, adjust the power output and press the camera shutter, then the flash will fire a flash under the camera synchronous signal.
Press Mode Selection Button to enter S1 mode. In this mode, the flash can function as a slave flash for creating multiple lighting effects. It is respectively applicable to manual flash environment.
In S1 mode, the flash will fire synchronously when the master flash fires, the same effect as that by the use of radio triggers.
Press Mode Selection Button to enter S2 mode. In this mode, the flash can function as a slave flash for creating multiple lighting effects. It is respectively applicable to manual flash environment.
In S2 mode, the flash will fire synchronously when the master flash fires the second flash.Note: In M mode, the slave triggering function does not work.
6.Sync Trigger Function
The flash can synchronize with the camera by using a PC sync cord to connect the camera and the flash's PC Sync Socket together.
7.Manual Zoom Function
The zoom-head position is manually adjusted within the range of 24mm, 28mm, 35mm, 50mm, 70mm, 80mm, and 105mm. By pressing ZOOM, you can select a suitable focal length.
8. Power-Saving Function
In M mode, the flash will enter standby status after about 30 minutes' idle operation. To wake it up, press any button.
In slave triggering mode S1 or S2, the flash will enter standby status after 60 minutes' idle operation. To wake it up, press any button.
Net Weight :18.76 Ounce
1 x TT660 flash speedlite
1 x mini stand
1 x black protector bag