# SynchroBox > PhotoRobot multi-camera controller that fires each camera with its own advance; up to 8 cameras per unit, units can be linked. Also known as: Multi-Camera Controller. Category: Hardware. The SynchroBox is PhotoRobot's multi-camera controller. When two or more cameras are used, it fires each camera's shutter with its own advance so that all of them capture the desired angle despite different shutter lags. ## How PhotoRobot uses it The SynchroBox is a rack-mount device; one unit connects up to 8 cameras, and several units can be stacked and linked into a cluster when a set-up needs more. It receives the shutter pulse from the control unit and, using the shutter lag value entered for each camera, triggers each shutter early enough during non-stop rotation. It is required whenever a PhotoRobot system works with more than one camera, for example the [MultiCam](https://www.photorobot.com/robots/multicam). Because it is electronics rather than mechanics, it is not tied to the MultiCam arch: linked units can fire dozens of cameras placed around a subject to freeze a moment in a [bullet-time](https://www.photorobot.com/glossary/bullet-time) shot. ## See on photorobot.com - [SynchroBox setup user guide](https://www.photorobot.com/manuals/synchrobox-setup) ## Related terms - [Shutter lag](https://www.photorobot.com/glossary/shutter-lag): The delay between triggering a camera and the moment the image is actually exposed. - [MultiCam](https://www.photorobot.com/glossary/multicam): PhotoRobot multi-camera arch that captures several elevations at once for multi-row 360 and 3D photography. - [Fast Spin](https://www.photorobot.com/glossary/fast-spin): PhotoRobot capture mode that photographs during continuous turntable rotation instead of stopping at each angle. - [Control unit](https://www.photorobot.com/glossary/control-unit): The computer inside or beside every PhotoRobot that drives its motors, triggers cameras and connects it to the network. - [Bullet time](https://www.photorobot.com/glossary/bullet-time): Effect in which many cameras around a subject capture the same instant, so a frozen moment can be viewed from a moving viewpoint. ## Where this term appears on photorobot.com Mentioned on 5 pages. Most relevant: - [PhotoRobot SynchroBox - Functionality & Setup User Guide](https://www.photorobot.com/manuals/synchrobox-setup): …technical documentation describes the functionality and setup of the PhotoRobot SynchroBox to synchronize two or more cameras. - [PhotoRobot MultiCam and Centerless Table Installation Guide](https://www.photorobot.com/manuals/multicam-centerless-table-installation): …Table HD rack with control units and router Control Unit G6, Laser Box, Switch Box, and SynchroBox Internal cable routing through left and right stemples Centerless Table background holder console… - [PhotoRobot Control Units - Technical Documentation](https://www.photorobot.com/controller): The Multi-Camera Controller (SynchroBox) provides precise synchronization of multiple cameras during the “fast spin” rapid photography method. - [PhotoRobot Carpet Studio with Carousel - User Guide](https://www.photorobot.com/manuals/carpet-studio): Power on the SynchroBox. - [Introducing: PhotoRobot's MultiCam for Multi-Row Product Photography](https://www.photorobot.com/blog/introducing-photorobots-multicam): Then, for even more camera support, there’s PhotoRobot’s Synchro Box that can be used in combination with the MultiCam system.