The receiver can be installed on 1/4"-20 threaded stud bracket or standard cold shoe Three-in-one function: (First, set the transmitter and receiver on the same channel.) Wireless Trigger Studio Flash: Turn the function switch to "Flash" mode on the transmitter and receiver. After the camera is powered off, place the transmitter on the camera's hot shoe adapter. When the studio flash is off, connect the studio flash to the receiver through the PC synchronization cable. Press the camera shutter button, and the studio flash will be triggered at the same time Wireless trigger flash: Turn the function switch on the transmitter and receiver to the "flash" mode. After the camera is powered off, place the transmitter on the camera's hot shoe adapter. When turning off the flash, place the flash on the receiver's hot shoe adapter. Press the camera shutter button, and the flash will be triggered at the same time Wireless control shutter release: Turn the function switch on the transmitter and receiver to the "Camera" mode. When the camera power is off, connect the receiver and camera through S2 shutter cable. Press the trigger button to control the shutter speed of the camera Specifications: Model: FC-16 Frequency: 2.4GHz Channel: 16 Transmitter connection: hot shoe installation/2.5mm jack Connection of receiver: cold shoe/hot shoe seat with 1/4"-20 screw hole/2.5mm jack Power supply: 2x AAA battery for transmitter, 2x AAA battery for receiver (not included) Weight: transmitter: 50g; Receiver: 50g Material: plastic Note: The camera and battery are not included. If your camera does not have hot boots, please use the attached "PC Sync Cable" to connect the camera and transmitter.