Wireless CT-04 Flash Trigger with 4 Receivers for Nikon SpeedLite, Canon SpeedLite, Olympus, Pentax, Sigma, Sunpak, Vivitar and Other Flashes
This wireless trigger is control discreteness for camera to trigger the studio flash synchronously. It's made up of two parts named signal transmitter and receiver. Receiver power type: Battery. The signal transmitter makes use of advanced circuit design and comport. It can transmit wireless signal that is being encoded. It can totally control four different flashes as the picture above showing us.