Calumet Pro Series Digital Shutter Timer Controller (CF0098): This multi-functional unit is designed to trigger the camera’s shutter with precise & regular time intervals. It features a self timer, an interval timer, a long-exposure timer, & exposure-count settings. It can be set anywhere from 1 second to 99 hours, 59 minutes, & 59 seconds. It is simple to use & can be operated with a single h&. As a self-timer it means that you can take a single photo after a specified time period up to the maximum specified above. As an interval timer it activates your shutter repeatedly at a specified period between exposures up to the maximum specified above. As a long-exposure timer, with your camera set on “bulb, ” it will hold the shutter open for any specified time up to the maximum specified above. It also means that you can specify the number of exposures your camera will make up to 99, or can be set to fire indefinitely until the unit is stopped. You may also combine multiple timer functions to perform a series of precisely timed actions at prescribed intervals. Its shutter release is a two-stage button: half-pressing it will cause the camera to focus, & fully-pressing will trigger the camera’s shutter. The timer comes with a battery & lanyard that means that you can safely hang the timer from your camera or tripod while you are not attending it. Please Note: This unit requires a dedicated shutter release cable to match specific camera models & these are sold separately. Shutter release cables are available for most popular current camera brands & models. Manual: Click here to read the manual for CF0098.