The nissin receiver air r for canon adds a new dimension of flexibility to the popular nissin air system nas'. '.strtoupper('c')ombined 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'. '.strtoupper('h')igh speed sync up to 1 8000 seconds, zoom and manual power output can all be controlled wirelessly'. '.strtoupper('w')hat'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'. '.strtoupper('e')xisting 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.