【Multifunctional Professional Flash Trigger】 The upgraded QPRO-S TTL wireless flash trigger supports TTL automatic flash, flash exposure compensation (FEC), 1/8000s high speed sync, multi strobe flash, manual flash, magnification, group modeling lamp control, group zooming, single point triggering, and simultaneous output value adjustment for all groups. Please turn on the wireless flash mode and and disable single contact mode ''SHOOT'' for the high speed sync function | 【Single Point Triggering】 Enter C.Fn SHOOT via the MENU button to start single point triggering with the trigger mounted on cameras for fast continuous shooting. Note: Only triggers flash under M/Multi Mode, not for parameter adjustment. The 1/8000s high speed synchronization allows for faster shutter speeds and ideal for fast moving subjects, and supports a focus assist light that automatically lights up under dim light when the camera is unable to focus | 【Built In 2.4G Wireless Q System】 Wirelessly trigger NEEWER Q4 Q3 Z1-S Z760-S NW420-S NW655-S S101-300W PRO/400W PRO thanks to the built in NEEWER wireless Q system, or control other flashes without a Q system using a NEEWER QR receiver and a 2.5mm sync cord (all sold separately). Also remote control via 2.4GHz stable connection for flashes up to 5 groups, 32 channels, and 01-99 ID settings, and set them all on the same channel and ID settings to tigger without signal disturbance | 【Screen Magnification Function】 The flash trigger features an LCD ultra large high definition display screen where up to five flash groups are shown at one time. Double click the group button quickly to switch from the setting page of all groups (A-E) to the enlarged view of the settings and related details of the corresponding group. The five group buttons, four function buttons, and a scrolling wheel makes parameter settings clear, intuitive, and easy to use | 【Wide Compatibility】 The QPRO-S flash trigger can be quickly fixed on the camera with the metal hotshoe. Compatible with Sony A9 II A9 A7R V A7R IV A7 IV A7R III A7S III A7 III A7S II A7R II A7 II A7S A7 A7C A1 A6600 A6500 A6400 A6100 A6000 A99 A350. Note: Firmware upgrades are available to address compatibility issues