Hot Shoe Flash Remote Control Controller Slave Trigger for Canon EOS Rebel T5i T4i T3i T2i T1i TXi Nikon D7100 D7000 D6000 D5000 D5100 D5200 D3200 D3100 D3000 Adopts optical theory making the master flasher to control remotely the auxiliary one to flash synchronously without the need of connecting wires Small in volume, good-looking in exterior, high in flexibility and stable in performance To sense light from the master flash so as to trigger the slave flash wireless Flash Adapter is compact and sturdy with a standard hot shoe mount on the top and a standard thread screw socket for tripod on the bottom Suitable for all Flash