The Godox X1T-O TTL 2.4G Flash Trigger functions with a 2.4 GHz wireless radio transmission that can travel up to 100 m. The flash trigger can be mounted on Olympus and Panasonic TTL cameras. Its radio-transmission system supports up to 32 channels and 5 groups. The flash trigger has a hot shoe at the top for connecting an electronic flash, as well as a PC sync terminal for studio strobes. You may view the current flash setting in the backlit LCD screen of the trigger. The X1T-O works on two AA batteries. With the micro-USB port, you may update the firmware of this flash trigger.