The falcon eyes rf-a2416 is a modern wireless trigger set that works at 2.4 ghz. other flash units can simultaneously flash through their own built-in slave receiver, but you can also use optional extra receivers. The triggerset has 16 different channels so you are very flexibel when shooting large projects. the transmitter fits on any camera except cameras from sony and minolta. for these cameras you will need an adapter (see "optional accessories"). the receiver is mounted between the power cord and studio flash. This triggerset is not compatible with: Combination with a sony camera If you have a sony camera with a new sony hotshoe connection, you can use the tf-334 from the optional accessories. if you have a sony camera with an old connection, you can use the hs-25sa.