have beltronics front and rear hard wired works great , had one on my porsche and if saved me many bucks

 

I don't use anything except for Waze. The speed where you want to but make sure you there isn't traffic around. I've had my XF over 140 and pulling more...in the pandemic on an empty highway for miles. I'm sure my F-type can get up faster and get up top speed.of 200 mph+, but you can't anticipate people who can't see you from behind.

 

Isn't it limited to 186 mph (300 km/h)?