Great Product - Congrats on thinking thru and designing for a "Wire-Free" experience, with Solar batteries and the clever hack of the OBD port connector to offload some functions (wake-up on reversing etc).
That said - it seems it is 2-3 years too late to be launching this.
1)By 1 May 2018, all new US Cars will have back-up cameras by law [1]
2) Most Cars sold since 2011/12 seem to have integrated back-up cameras
3) $500 for a Car accessory (!) that by definition will be fitted on a lower end car older model (since high end cars had this for a while) aka Low sales.
4)OBD port contention
Pivot Idea - Dash cam recorder (go in front plate) with AI for alerting based on User set rules (in addition to Dash Cam recording)
[1]: https://www.transportation.gov/briefing-room/nhtsa-announces...
Edit:
Why in the name of funk did you design your website to take away manual scrollability?
If I want to quickly skim it I have to endure the pointless transitions - I get that you want to enforce a certain flow - but let me cleanly escape out of it as well,