From Manufacturer
Free yourself from cables and the line-of-sight demanding optical slave modes with the Nissin Air 1 Commander , featuring the Nissin Air System with 2.4 GHz radio transmission for wireless master TTL control over NAS-compatible flash units such as the Di700A. This unit is compatible with Canon cameras that utilize E-TTL / E-TTL II metering and offers a triggering range of up to 98'. Also, it features eight channels and three groups for setting up numerous flashes with different settings and modes, all from the commander unit.
High-speed sync is supported with a maximum sync speed of 1/8000 second along with compatibility for 1st & 2nd curtain sync modes. The zoom setting of the flash can also be manually adjusted from 24-200mm, along with the power from 1/1 to 1/128. The Air 1 features a color LED control panel to view settings and make adjustments as well as an AF assist beam for focusing in low light conditions. Additionally, it runs on two AAA batteries.