Do you own a Tesla?

AP1 vs AP2 vs AP2.5 in the Tesla refers to image processing hardware and software.

https://en.wikipedia.org/wiki/Tesla_Autopilot#Hardware_1

The AP1 includes forward looking radar by Bosch, ultrasonic detectors and a forward facing Mobileye EyeQ3 camera at the rear view mirror mount. That camera does many things including rain detection. It also detects speed limit signs.

https://www.mobileye.com/uk/fleets/technology/speed-limit-in...