Features: Manual flash trigger for Canon cameras with LCD display screen.16 channels & 6 groups.TX/RX/TRX multiple working ways.A/B/C/D/E/F 6 groups (compatible with YN560-TX). Wireless shutter remote control. It can work with the older flash trigger RF603II, RF603 & RF602 as well. Communication range up to 100M. Function 1: As a Wireless Flash Unit Trigger The flashes being mounted on these transceivers can be wirelessly synchronously triggered. It is Hotshoe Pass-through, you can use a flash on top of your camera. It has wake-up function so you can wake up your flash just by pressing the shutter release button. Function 2: As a Wireless Shutter Release It can instantly trigger the shutter without disturbing the camera in the distance. Function 3: As a Wireless Studio Flash Trigger Using the Studio Flash Sync Cable, these transceivers can wirelessly synchronously trigger the Studio Flash (es). It is a good kit for studio photography.