The Nissin Receiver Air R for Canon adds a new dimension of flexibility to the popular Nissin Air System (NAS). Combined with the Nissin Commander Air 1* it allows a photographer to wirelessly control almost any kind of Nissin camera flash and many original Canon flash with NAS and TTL & HSS support. High Speed Sync up to 1/8000 seconds, zoom and manual power output can all be controlled wirelessly. What's more, one Commander transmitter can control up to 21 separate Air R receivers, which can be programmed into three groups to give the camera user an almost unlimited range of lighting options without having to spend precious time readjusting flashguns between shots. * Existing Commander Air 1 users: In order to control the Receiver Air R properly, the Commander Air 1 needs to be equipped with the latest firmware.