ISA

IBM AT (advanced technology) computer expansion bus design, the full name is Industry Standard Architecture, this design uses 16-bit bus, there are several 8-bit slots for backward compatibility. The AT bus has increased the data bus bandwidth and the address bus has been increased to 24 lines, enough to address 16 MB of memory. Backward compatibility is guaranteed by adding an additional connector to the original 8-position 62-pin connector. Several new interrupt request IRQ lines and direct memory access (DMA) control lines have also been added.

The dual-lens Dash Cam means that the dash cam has 2 cameras. 
The common dual-recording driving recorder has one camera to record the driver's front view, 
and the other camera to record the external conditions behind the vehicle, including the outside road conditions. Vehicles, etc., 
can deal with situations such as rear-end collisions.
The front and rear two-way dash cam can record in all directions.