Product Descriptions Anyone who has ever used a camera knows that the majority of cameras come equipped with a flash device of some sort. Flashes are essential in taking photos indoors or in areas where lighting is poor. This is Godox TT520 camera electronic flash speedlite, that can be fired when it"s not directly attached to the camera"s hotshoe is known as off-camera flash. This technique is usually used to give more flattering lighting than the very flat, straight-on light you get from a flash attached to the camera. Unique design and high performance. Time to enjoy the benefits this camera flash speedlite brings! Specifications Model: TT520 Guide number (ISO100): 33 Flash mode: M, S1, S2 Vertical rotation angle: 0~90° Horizontal rotation angle: 0~270° Power source: 4*AA batteries (AA alkaline batteries used) (batteries NOT included) Consistent flash output: 1/128, 1/64, 1/32, 1/16, 1/8, 1/4, 1/2, 1/1 Lighting times: 100~1500 times (AA alkaline batteries used) (batteries NOT included) Recycle time: approx. 0.1~5 s (AA alkaline batteries used) (batteries NOT included) Flash duration: 1/300 s~1/20000 s Color temperature: 5600K±200K Compatible with All DSLR cameras with standard hot shoe, such as Nikon, Canon, Pentax, Olympus, and so on. But except for Sony and Minolta, because they use different hot shoe. Note: The optic light sensor will stop function under M Mode. The hotshoe"s trigger function will stop under S1 and S2 mode. Package Includes 1* Flash speedlite 1* Protecting bag 1* Mini stand 1* User Manual