Phottix Odin II TTL Flash Trigger Receiver for Canon This is the Odin II Receiver only (Transmitter available separately). Introduced in 2014, there is no flash triggering system that is more anticipated than the Odin II. It is the result of operational requests from the thousands of happy Odin users who love their TTL flash systems & want even more. Phottix is delivering on all of its promises. & then some. Unrivalled Control & Streamlined User Interface The Odin II gives photographers more control than they have ever experienced; control that is direct, logical, & fast. Each of the 5 Groups has its own quick-access button. Changes are made by turning a large, perfectly-placed, controldial. Pick the light. Make the change. Lock it in. Shoot. A large, illuminated LCD panel shows all settings at a glance. Control five lights or groups of lights, in TTL Auto or Manual. Switch a Group OFF & its display line disappears from the screen. Displaying only active groups assures an easier & simpler viewing experience.