WanSen DC-04 4-Channel Wireless Studio Flash Trigger Kit For Strobe Description: Remote studio flash trigger serves as a controller for synchro triggered flash for studio cameras Consists of a signal transmitter and a receiver trigger and operates by a wireless frequency modulated remote control The signal transmitter uses advanced circuit and components and can transmit the encoded FM wireless signal Receiver trigger adopts dry battery for power supply, which is safe, energy-saving and convenient The product adopts microcomputer to control the decoding, which has excellent anti-interference ability sensitive response speed, the highest synchronous speed can reach 1/250 sec The transmitter circuit has the function of standby and hibernation, so it has low power consumption products can work in standby mode for more than a year with only one battery continuously trigger thirty thousand times The trigger current is only 0.01mA, which will definitely not damage the camera flash contract The transmitter is applicable to traditional or digital Carema with hot shoe or computer control interface Specification: Operation range outdoors (open area):andgt 30M / 90ft (open area, no fraise) Operation range indoors:andgt 25M / 75ft Frequency Channel: 4 Working frequency: FM 433Mhz External synchronous speed (open area): max. 1/250 sec Internal synchronous speed: max. 1/250 sec The package includes: 1 x transmitter 1 x receiver