Full manual, TTL and HSS control with most Canon, Nikon & Sony cameras. Compatible with S1 and S1a.Product Highlights:Gives you wireless control of the S1, S1A and Honey Badger from the camera positionSupports Canon, Nikon & Sony i-TTL protocolSupports High-Speed Sync up to 1/8000 sec.300' Range gives you the freedom to move