Features: 2.4G Ultral-Long-Range Wireless Flash2.4G ultra-long-range wireless flash with the farthest triggering distance up to 100 meters; can receive the signals sent by RF-603 or RF-602 wireless transmitter, supporting 16 channels. Multiple Trigger Mode SupportedGN58 at ISO100,105mm High guide number 2.4G wireless flash, supports M/Multi mode, can be triggered by the camera set-top, 2.4G wireless trigger. S1 and S2 light are sensitive trigger, S2 with pre-flash-canceled mode. High Speed Recycling SystemThe recycling time for full output just takes 3s; you can get high speed current return experience even without using brand new batteries, which will only takes 4-5s; besides, you can use the external charging box to accelerate the charging speed. Electric Zoom & Sound Prompt FunctionLamp cover focal length can be altered between 24-105mm by pressing [ZOOM] button; When the sound prompt system is enabled, different sound modes will prompt different working conditions of the speedlite so as to allow you to focus on shooting process (Note: the sound can be turned off). Other Practical and Powerful FunctionsWith charging socket for external power pack, meeting your higher demand for charging recycle; equipped with PC port to connect speedlite to your camera and make them synchronized; can automatically save your current operating settings to convenient your next use. Specifications: Brand: YONGNUO Model: YN560 III Circuit design: Insulated Gate Bipolar Transistor (IGBT) Guide No.: 58 (ISO 100, 105mm) Flash mode: M, Multi Triggering mode: Camera set-up, S1, S2, RX Zoom range: 24, 28, 35, 50, 70, 80, 105mm Vertical rotation angle: -7 to 90 degrees Horizontal rotation angle: 0 to 270 degrees Power supply: 4 * AA size batteries (not included; Alkaline or Ni-MH are usable) Lighting times: 100-1500 times (AA alkaline cell used) Recycle time: approx. 3s (AA alkaline cell used) Color temperature: 5600k Flash time: 1/200s to 1/20000s Flash control: 8 levels of output control (1/128 to 1/1), 29 levels of fine tuning External interface: hot shoe, PC port and eternal charging port Wireless triggering distance: 100m(2.4G wireless); 20-25m indoor, 10-15m outdoor Additional Features: The electronic flash head zooming, sound signal, automatically saving setting, power saving mode, over heat protection and advanced options Item Size: 19 * 6.5 * 5.5cm/ 7.7 * 2.6 * 2.2in Item Weight: 368g / 13.0oz Package size: 21 * 9.5 * 8cm/ 8.3 * 3.7 * 3.1in Package weight: 542g/ 1.2Lbs Package List: 1 * Speedlite 1 * Mini Stand 1 * Protecting Bag 1 * User Manual