- Accessory GPS device should have a different zoom level than the dashboard GPS, it doesn't make much sense having 2 devices showing the exact same info.
- Accessory GPS should work whether the dashboard has a GPS or not.
- Any GPS device should show the next rest time.
- Any GPS device should show the trip or next destination time.
As a bonus:
- Windshield to support several devices + add a device that would show truck info independent from the truck's dashboard
Info such as, speed, CC, Gear, Fuel, truck dmg, ....etc (on different pages ofc.)