The JSYK 3B Optical Slave Trigger from JJC is a practical accessory for flash units that provides a reliable solution for photographers looking to synchronize their flashes. This optical slave trigger is equipped with a light-sensitive cell that detects the light from a main flash and subsequently triggers a second flash. This allows for flexible lighting design and creative lighting effects in photography. The trigger is designed for standard shoe flashes, with the exception of Canon models, and can be easily attached to various flash units. Using the JSYK 3B Optical Slave Trigger opens up new possibilities for lighting setups and enhances control over the lighting situation. It is a valuable addition to the gear of photographers working both in the studio and outdoors. With this accessory, you can expand your photographic skills and achieve impressive results.