Features: This speedlite equipped with universal hot shoe contact, is compatible with Canon/Nikon/Sony/Olympus/Pentax and other brands DSLR cameras. 4 flash modes: M(Manual), Multi, S1 and S2, meet all your shooting needs. With 3.5mm sync input port, the flash will work synchronously when the sync port is connected. Power saving function, under M & Multi modes, the flash till enter stand-by state in about 30 minutes if idle use. Over-temperature protection function will be activated if you continue to flash too many times. You can use it normally after cool down. Specifications: Circuit Design: Automatic Insulated Gate Bipolar Transistor (IGBT) Guide No.: 33 (ISO 100, 35mm) Flash Light Coverage Range: Fixed-focus, flash speed rotating(bounce flash) Flash Mode: M, S1, S2, Multi Wireless Trigger: S1/S2 photo tonus Wireless Flash Distance: 20-30M Bounch Position: up/down 0/90degrees, left/right 0/270degrees Color Temperature: 5500k Flash Duration: 1/200s~1/20000s Flash Control: 1/128~1/1, 22 levels of fine tuning External Interface: hot shoe, 3.5mm sync socket, external C power socket Recycle Time: 0.1-5S(using AA alkaline battery) Power Supply: 4 * AA batteries (not included) Lighting Times: 100~1500 times(using AA alkaline battery) Item Weight(without battery): 316g/ Package Size: 20.5 * 9 * 7cm/ 8.1 * 3.5 * 2.8in Package Weight: 400g/ 14.1oz Note: Batteries are not included. The camera showed in the picture is not included. Package List: 1 * Speedlite 1 * Carry bag 1 * Mini stand 1 * User manual(English&Chinese)