Use this flash trigger to make the master flasher to control remotely the auxiliary one flash synchronously without the need of connecting wiresTo sense light from the master flash so as to trigger the slave flash wirelessWork with most flash units using ISO universal hot shoe like , , , (except flash)This slave trigger NOT fit for Minolta / / flashThe Wireless Hot Shoe Flash Remote Slave Trigger adopts optical making the master flasher to control remotely the auxiliary one to flash synchronously without the need of connecting wires.It features small in volume, good-looking in exterior, high in flexibility and stable in performance, it can also artificially create different kinds of effect.Material: ABS + metalPackage Contents:1 x Wireless Hot Shoe Flash Remote Slave TriggerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.