YONGNUO DIGITAL YN560 IV WIRELESS SPEEDLITE 2.GHZ

The YN560 IV can be used as master unit, provides 3 independent groups with controlling ability, realizing remote control the flash mode, flash output and focal length of the YN560 IV and YN560 III. 
*Supports Wireless Slave Function, fully supports YN560-TX, RF-603(I/II), RF-602 Wireless transmitter:
One YN560 IV can respectively receive the wireless signal from YN560 IV, YN560-TX, RF-603 (I/II), RF-602 with optional 16 channels; when the YN560 IV and YN560-TX used as transmitter, it can realize remote control the parameter settings. 
*Multiple Trigger Synchronous Mode Supported: 
The YN560 IV can triggered through the set top of the camera, 2.4G wireless triggering, S1 and S2 pre flash cancel mode. 

Specifications:
Circuit design: Insulated Gate Bipolar Transistor (IGBT)
Guide No.: 58 (ISO 100, 105mm)
Flash mode: M, Multi
Triggering mode: Camera set-up,TX, RX, S1, S2
Zoom range: 24, 28, 35, 50, 70, 80, 105mm
Vertical rotation angle: -7~90 degrees
Horizontal rotation angle: 0~270 degrees
Power supply: 4* AA size batteries (not included)
Lighting times: 100~1500 times (AA alkaline cell used)
Recycle time: approx. 3s (AA alkaline cell used)
Color temperature: 5600k
Flash time: 1/200s~1/20000s
Flash control: 8 levels of output control (1/128~1/1), 29 levels of fine tuning
External interface: hot shoe, PC port and external charging port
Wireless triggering distance: 20~25m indoor, 10~15m outdoor, 100m(2.4G wireless)
Additional features: The electronic flash head zooming, sound prompt, PC prot, power saving mode, overheating protection and auto save settings
Item size: 20 * 7 * 5.5cm / 7.9 * 3.0 * 2.2in
Item  weight: 366g / 12.9oz
Package size: 21 * 10 * 8.5cm / 8.3 * 3.9 * 3.3in
Package weight: 541g / 1.19Lbs