Optical Flash Slave Trigger JJC Hot Shoe Sync Adapter with PC Socket,Optical Sensor & 1/4"-20 Threaded Socket Cold Shoe for All Flashes Speedlight with Standard ISO 518 Hot Shoe-1 Pack

The flash standard hot shoe on the top is perfectly fit for off-camera flash, microphone, studio light other equipment or devices with standard ISO 518 hot shoe excepts Canon, Optical Sensor: Optical flash slave trigger for lag-free firing of a second flash unit. For shoe-mount flash units-no cord required, The PC female outlet on the side, enabling you to trigger flash mounted onto the upper hot shoe and additional flash or studio light (A sync cable is excluded), The standard cold shoe on the bottom is compatible with DSLR, mirrorless digital camera, camcorder and other cameras with standard hot shoe, The 1/4"-20 Tripod Socket can be mounted onto a tripod with a 1/4"-20 male screw. And the lock nut helps you mount the devices tightly