Meike MK-930 II MK930 Flash Speedlight for Nikon D70 D80 D300 D700 D90 D300s D7000 D3200 D800 D800e  Features:   The improved wireless triggering sensor: Meike improves the wireless triggering sensor for MK930、 which makes the s1 and s2 mode can mode can be used in outdoor environment and the wireless triggering distance is as long as 15m. New charging socket for external power pack: adds a charging socket for external power pack、 power pack、 to meet your higher demand for charging recycle. New pc synchronous port: adds a standard pc synchronous port、 which makes it simple for you to use the pc synchronous line. Super speed of charging recycle: it only takes 3 seconds in charging after full power output: even without new batteries、 you can get the super charging speed than it only needs 4-5 seconds; you can use the external power pack to accelerate the charging speed once more. High speed continuous shooting: Under the output level of 1\/8 or below、 MK930 can support the 8FPS high speed continuous shooting. The improved power saving mode: in the power saving mode、 the flash will get automatic shutdown. Circuit Design:  Insulated Gate Bipolar Transistor (IGBT)  Specification:                          Guide Number         58 (ISO 100、 105mm)               Flash Mode         M、 S1、 S2               Vertical Rotation Angle         0~90 degree               Horizontal Rotation Angle         0~270 degree               Power         4 X AA Alkaline cell or AA hydrogen cell               Lighting Times         100 - 1500 times (with alkaline batteries)               Recycle Time         approx 3s ( AA alkaline cell used)               Color Temperature         5600K               Flash Duration         1\/200S - 1\/20000S               Flash Control         8 levels of output control (1\/128s - 1s)               External Interface         hot shoe、 PC port and eternal charing port               Wireless Triggering Distance         20-30m indoor、 10-15m outdoor               Additional Features         Sound indicator、 PC port、 Power saving mode and over heat protection               Dimensions         200 x 75 x 57mm               Suitable for         for all Nikon cameras         Package Included:    1 x Meike MK-930 for Nikon   1 x Flash Stand   1 x Protection Bag   1 x User Manual    Detail Pictures: