The wireless flash trigger tr-1 offers flexibility when working in a photo studio. no longer being bothered by the annoying sync cable. an infrared transmitter works the same as a tv remote but the tr-1 has a stronger signal. the signal is transmitted forward and unlike the radio wave set not 360°. the tr-i is a cost-effective solution for flashing wirelessly. The falcon eyes tr-1 works with all cameras that are equipped with a hotshoe with centre contact where normally the external flash unit is mounted. works on studio flash units with a built-in slave. Note: works on all cameras, however with the sony / minolta cameras you will need the hs-25sa (see "optional accessories"). This triggerset is not compatible with: