Using Bluetooth technology to link your DSLR camera to your smart phone, the Smart Trigger allows for precise control of your pictures with three different shooting modes: Regular Shot mode allows your smart phone to act as a wireless shutter for your camera. Simply touch the button on your smart phone to capture a picture – perfect for including the photographer in group shots! Manual Shot mode allows you to take long exposures in bulb mode. Featuring a focus button and a shutter lock, use Manual Shot for photographic techniques like star trails and light painting. Timed Shot mode converts your smart phone to a full-featured intervalometer. Use this mode to perform advanced photography techniques like time-lapses.