【ITTL Mode】The speedlite will flash robotically by way of the lens of the camera .
【S1/S2】
S1/S2 mode is used as off-camera auxiliary to creat more than a few effects.
【M mode】Under the M(Manual setting)mode,you’ll be able to set the flash index as you like.
【Stroboflash mode】Stroboflash is a type of model that can analyse the motion of subject.
【Sleep mode】The flash will enter sleep mode if don’t have any any operation in 90 second.
【Memory function】The speedlite will recuperate the last mode and setting when it’s turned on again.
【Overheating protection】Offer protection to speedlite from high temperature,lengthen its life.
【Frist-Curtain Sync】
【Second-Curtain Sync】
Features
High GN:42
Wireless trigger sensor
Recycle time 3 seconds(with 4 pcs AA alkaline cell )
Compatible with I-TTL flash automatically
Support Muti-flash lighting Appliction(S1/S2 mode)
Power saving mode
Accurate brightness control
Metal hot shoe
Specifications
Guide Number:42(ISO100 ,105mm)
Flash mode:I-TTL,MULTI,M/S1/S2
Flash zoom value:24/28/35/50/70/80/105mm
Vertical rotation angle:0-90degrees
Horizontal rotation angle:0-270 degrees
Lighting times:100-1500 times
Color temperature:5600k
Flash time :1/200s–1/20000s
Flash keep watch over:8 level of output keep watch over(1/128–1/1)
Wireless triggering distance:20-30m indoor ,10-15m outdoor
Additional features:FEC,AEB,Manual zoom,Auto zoom
Dimensions:17*7*6cm
Net wight:275g
Packing include:
VK43O Speedlite*1
Protecting bag*1
Hot shoe stand*1
Warranty card*1
Manual*1
High Guide Number(GN) :42. With wireless trigger sensor.
Compatible with I-TTL auto-balanced fill flash. Optical slave mode supports more than one Speedlite to work together.
Front and rear curtain sync.
LCD display, precise keep watch over of the brightness of light, easy to use.
Overheat protection, automatic detection of flashlite temperature,extended service life.

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