With its low profile design, you can use thePocket Wizard MiniTT1 Transmitter on camera to trigger remote E-TTL speedlites or studio flashes attached to FlexTT5 Transceivers. Place TTL or manual flashes anywhere to illuminate the scene. The MiniTT1 is compatible with any PocketWizard radio for triggering manual flash or remote cameras, and sits on the camera's hot shoe. Your new MiniTT1 can be upgraded via USB cord at any time and offers 32 channels (multi-zone).