This flash trigger is suitable for multi-channel triggering and stable signal transmission, and is designed for Sony cameras mounted on a hot shoe. It supports E-TTL II autoflash and professional functions, with 16 groups and 32 channels for wireless control and triggering. You can add 01 to 99 wireless ID settings, which can only be triggered when the channels and wireless IDs of the master and slave units are set to the same, effectively avoiding signal interference. The zoom function allows for group switching between group mode and multi-group mode. It features an extra-large LCD panel, and 5 group buttons along with 4 function buttons for convenient handling.