I took two boxes. ca allows me to remotely trigger the housing and up to two flash. This is great this is the simplicity of starting, we put the batteries are installed on the base of the flash and camera, we light each unit, it triggers and it works! On 2 AAA batteries box, no integrated rechargeable battery as for competition. There is no risk of being stranded in the middle of a photo shoot with a discharge box that must spend hours recharging. No need to specify if the case is transmitter or receiver as others. ca is done alone. 3 to 4 times cheaper than Pocket Wizard Plus II.
What it does not (it is precise in the instructions, so no surprise): 1- no transmission of information to the TTL flash: the flash must operate in manual mode 2- no possibility to choose different channels, so that may interfere with each other if multiple users at the same place.
