Optical Flash Slave Trigger JJC Hot Shoe Sync Adapter with PC Socket Sensor 

• 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