This picture is of a Loudon school bus camera or vehicle camera surveillance system installation. At the time, this DVR was one of the smallest available.  Now this school bus video or vehicle camera system DVR is much larger than the new SD4FH series that now offers 4 times higher image resolution up to 1080P. The older system was VGA 480x640TVL.

For most Low cost Mobile Video Vehicle Camera Surveillance Recorders applications, such as Students With Disabilities & Special Needs Transportation Wheelchair Equipped School Bus Camera Equipped buses the size of the MDVR can make a difference, as some of these buses working under the ADA School Buses need cameras that can record and document the passengers' safety and treatment during transportation.

Often, those who operate under government contract to transport students are required to have Private Service Contractor Charter Transport Compliance Bus Camera Systems to meet the requirements of the contract with the government entities.

To them, this is just another compliance requirement, but in other applications, these items are a serious fleet risk management tool to help improve the safety of the employees working on industrial equipment that may be dangerous.
​For example, the Forklift HD Industrial Materials Handling Equipment Operator Safety Camera System offers documentation of the event that can lead to serious injury and damage to products being moved or handled.