Product Review

About Powerextra:
Powerextra is a famous trademark who specializes in offering digital camera batteries and photo accessories on Amazon.We always try our best to make sure customers have a happy shopping experience with us by providing good quality products with pretty price.

Specifications:
Electronic structure:Insulated gate double-click the transistor automatically(IGBT)
Guide number:33(ISO 100/1M)
Power:4x AA batteries
Battery life:110-1500 times
Recycle time:3 seconds
Flash mode:M,S1,S2
Color temperature:5800K
Flash duration:1/200 seconds~1/20000 seconds
Flash control:Magnitude 8 brightness control(1/128-1/1)
Dimensions:190x75x55mm
Net weight:315g

Advantage:
M mode
In this mode,you can adjust flash brightness according to your own preference,the speedlight will flash under the camera synchronous signal

S1 mode
In this mode,DF-400 will trigger flash with the main speedlight first flash,the effect is the same as using radio trigger.When using this mode,your main speedlight should be set to manual flash mode,using neither TTL flash system nor red-eye removal function which caused multiple flash.

S2 mode
S2 mode is similar to S1 mode and is also known as "preflashing cancel mode",but it can ignore the preflashing from TTL,so you can use it to support the main speedlight that working in TTL mode.In particular,if S1 mode is unable to synchronously flash with your built-in speedlight,you can try to use S2 mode

Package Include:
Flash lamp x1
Protection bag x1
Mini stand x1
Instruction manual x1