Pixel TF-371 Soldier Wireless Grouping Flash Trigger Control for Canon Cameras and Flashes (Black) Pixel Soldier TF-371 for Canon is a Wireless Flashgun remote control for Canon Cameras. Can also work as a multi-function wireless shutter remote control, available to shoot with single, Bulb, continuous, delay mode. FSK modulation used to improve the reliability and stability of the product, use the free worldwide 2.4GHz frequency. Shutter speed up to 1/250S. (Depend the camera model, some camera are only support 1/250S or lower) Receiver can be set as group A, B or C; multi-receivers available for each group.