The Broncolor RFS 2 Transmitter Receiver Kit makes way for adding wireless functionality to your studio or work field by eliminating PC cords.The Broncolor RFS 2 Transmitter has 40 discrete channels for selection that helps in elimination of interference or overlap in multi-photographer eventsThe transmitter has an LCD screen that gives  information about channels, addresses, and power status of the systemA  single 3V CR2450 battery supplies power to the Broncolor RFS 2 Transmitter and ReceiverTo facilitate battery-free operation, a USB power supply (optional) is also included in this kitCompatible with all RFS equipped heads, the Broncolor kit is lightweight and easy to use