Products Package Includes: 2 x Transceivers, 1 x user manual. Are you searching for a studio flash trigger to replace your broken or old one? This studio flash trigger is what you are looking for and can be used as the controller of synchronous trigger studio flash of cameras. With fast sync speed, it is sensitive and easy to use. Featuring superior material and fine workmanship, it is durable and reliable enough for long-term use. In addition, this studio flash trigger is lightweight and small. It is a must-have device for each professional photographer. Don’t hesitate to buy it for your camera now! Trigger flash speedlite wirelessly. Trigger studio flashes strob (need PC Sync Cable). The flash sync speed is up to 1/1800s. Transmission distance: 100m. Wireless shutter release (Supporting 7 wireless channels and A/B/C three groups). As the wireless shutter release, its working range is up to 100 meters (clear outdoor environment). Full-way press the release button can starts continuous shooting or long exposure. YN-622C 2 transceivers kit consist two similar transceivers, support one camera controlling multiple flashes at the same time. Install the flashes with the receiver additionally purchased to make them into anapplication form of multiple-flashes,number of the recevers is not limited..