TG-1 is a device which generates external triggers for IIDC/IEEE1394 digital cameras at intervals you set. All you need to connect TG-1 with the computer is an IEEE1394b cable. You can change the setting such as intervals of external triggers easily with the pre-installed setting application. TG-1 has four input channels and four output channels. Those output channels can operate asynchronously. When inputting images from four IIDC/IEEE1394b cameras simultaneously, you can use TG-1 to build a system easily.