Impact ControlSync 16 Transmitter and Receiver Kit For Impact Astral Extreme AS-X-400 * Compatible w/ Interfit Strobies Flashes * ControlSync 16 Channel Transmitter ControlSync 16 Channel Receiver * Raise or Lower Flash Power Remotely * Controls Modeling Lamps and AF Assist 150' Range, Controls Audio Alerts * Receiver is USB Powered * View Transmitter Settings on LCD Screen Kit Includes:ControlSync 16 Transmitter, ControlSync16 Receiver