Mobile CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of mobile CCTV, with Digital Video Recorders (vehicle DVR), can provide recording for years.
Mobile CCTV systems come with varying quality and performance, options and extra features. Features might incliude advanced motion-detection or email alerts
A recent development is decentralised mobile CCTV cameras with megapixel sensors. These can be recorded straight to storage devices, or flash drives.
Public transport mobile CCTV is common in the UK. There are more cameras per person than anywhere else in the world.