Supports Wireless Master Function YN560 IV can be used as a master unit, provides 3 independent groups with control capability, realizing remote control of flash mode, flash output and focal length of YN560 IV and YN560 III . Support wireless slave function, fully support YN560-TX,RF-603(I/II) RF-602 wireless transmitter One YN560 IV can respectively receive wireless signal from YN560 IV,YN560-TX ,RF-603 (I/II),RF-602, with 16 channels optional; When the YN560 IV and YN560-TX used as a transmitter, it can realize remote parameter control. Multiple trigger synchronous mode supported YN560 IV can trigger via camera decoder, 2.4G wireless trigger, S1 and S2 pre-flash cancel mode. Auto-save settings, supports custom (Fn) settings Flash settings will be automatically saved when the flash is turned off; Users can customize the flash function setting as needed. GN58 @ ISO100,105mm High Guide Number 2.4G Wireless Speedlite, support M/Multi/-- mode. System Sound Indication When the sound guidance system is activated, the different sound ways will indicate different working states of the flash to let you concentrate on shooting. Electric Zoom Function Support The flash coverage can be changed between 24 and 105mm via the [ZOOM] button. Ultra-fast charging recycling system, supports external power supply Equipped with large size LCD screen, Standard PC synchronous interface Features: Supports all YONGNUO YN560-III YN560 IV flashes issued since January 2013 Two Modes of Flash: M/Multi Remote control of Flash output and Zoom per group, up to 6 groups. Compatible with RF602/RF603/ RF603 II 16 Channel Large Clear Screen, User Friendly Interface. Transmission range: 100 meters. Wireless Shutter Receiver of RF603/RF603 II When we look at the specifications, we see that it can control up to 6 tp groups, which means it can control up to 6 flash units. It is the only flash control unit so far that can control 6 flashes at the same time. Compatible with: For all Fujifilm Standard Hoteshoe Canon Nikon Pentax Olympus cameras For Sony A99 A58 A6000 A3000 A7 A7r A7s NEX-6N new hot shoe Cameras For Panasonic all camera models. Package list (you will receive) 1x New YN560IV Flash 1x Mini Flash Holder 1x Flash Protection Bag 1x English Manual 1 x Battery Box 1 x Soft Box Diffuser 1x 20 Color Filter Card