Phottix Odin TTL Flash Trigger Includes 3 Receivers for Canon + 8 AA Batteries And Photo4less Cleaning Cloth Wireless 2.4GHz. TTL and Manual Flash Triggering Mix TTL and Manual flash - fire some groups in TTL, others as manual. Remote power control of groups in TTL with +/- EV adjustments (3 stops in 1/3 stop increments - 18 different levels.) Remote flash head zoom adjustments - auto or manual Range of 100+ meters.