The AC3 ZoneController is the gem of the ControlTL product line. Add it to your on-camera MiniTT1, FlexTT5, or FlexTT6 and you instantly have three Zones of flash control. With the AC3, you can control your remote flashes from your camera’s position in either manual or eTTL mode. Now you can put your flashes wherever you want, without worrying about having to access them during a shoot. With the AC3 ZoneController, you are in total control of your flash.