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The VSI-PRO is a video to serial Interface. It overlays serial data to a video signal, typically from a cash register, but can be used for many other devices such as weigh bridges, speed cameras, cash counting devices, etc. The VSI-PRO translates data from transactions at the cash register and overlays this information as text onto the video images from the CCTV system. This information is permanently embedded onto the images, and therefore cannot be tampered with. The combination of cash register data and CCTV images makes it easy to identify suspicious transactions such as the example on the left. A quick review of the footage shows that this kind of transaction is easily discovered. Without the VSI-PRO this transaction would have gone undetected as neither a review of the CCTV footage or the till receipts alone would anyone have identified this. In addition the VSI-PRO not only captures this information, but allows the user to set up alarms on specific transactions, products, or invidual members of staff. The transactions are then fully searchable and depending on the set-up and can be reviewed at the touch of a button without viewing hours of surveillance.