Universal 4 Channel Wireless Remote Shutter Release Trigger for Camera Flashlight Wireless Studio Flash Trigger Rt-04 Transmitter Receiver Photography 1.RT series trigger is based on Wireless remote control system, convenient to operate, ultra-low voltage, battery saver 2.The transmitter is equipped with and advanced electric circuit. 3.Circuit design with sleepy function, low power consumption. 4.The receiver is used with altermating current, and it achives quick response under the advanced MCU control. 5.It can meet the need of sync flash for any different shutter camera.