Opened for inspection. The outer box may have stains or tears, but the contents are in good condition, so please rest assured. 【Multi-functional Professional Flash Trigger】The upgraded QPRO-C TTL wireless flash trigger is powerful and fully supports TTL auto flash, flash exposure compensation (FEC), 1/8000s high-speed sync, strobe flash, manual flash, magnification function, group modeling lamp control, group zoom, and single-point trigger, and can also adjust the output value of all groups simultaneously. 【Single-Point Trigger】Entering C.Fn SHOOT from the MENU button allows the trigger attached to the camera to start single-point triggering, enabling high-speed continuous shooting. Note: In M/Multi mode, only the trigger flashes and is not for parameter adjustment. The 1/8000s high-speed sync allows for faster shutter speeds, ideal for fast-moving subjects. It also supports a focus assist light that automatically turns on when the camera cannot focus in dim places. 【Built-in 2.4G Wireless Q System】With the built-in NEEWER wireless Q system, it can wirelessly trigger Q4 Q3 Z1-C Z760-C NW420-C NW655-C NW665-C S101-300W/400W PRO, and also control other flashes without using the Q system by using NEEWER QR receivers and 2.5mm sync cords (all sold separately). It also remotely controls flashes with up to 5 groups, 32 channels, and 01-99 ID settings via a stable 2.4GHz connection, and can trigger them without signal interference by setting all to the same channel and ID settings. 【Screen Magnification Function】The flash trigger has an LCD super-large high-resolution display screen, which can display up to 5 flash groups at once. Quickly double-clicking the group button switches from the settings page of all groups (A to E) to an enlarged display of the settings and related details of the corresponding group. With 5 group buttons, 4 function buttons, and a scroll wheel, parameter settings are clear, intuitive, and easy to use.