Control your wireless flash units from a distance with the Nissin Air 10s Commander. This wireless TTL commander is made for Canon cameras with E-TTL or E-TTL II support. It offers control for up to 328 feet with NAS-compatible flashes and receivers. The 2.4 GHz radio transmission uses eight channels and eight groups for communication. With the crossover TTL support, you can use Nissin Air System flashes with TTL systems. The commander can be used to adjust power from 1/1 to 1/256 and flash zoom from 24 to 200mm. When you use the memory function, it saves the setting of the TTL mode as you switch to the manual mode. You can use the AF assist beam when working in low light. The microSD card slot allows you to update the firmware.