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Rechargeable battery, tiny, can be easily mounted under the car or the grill so that it can be removed quickly, wifi connected to your iphone or android
No wiring and HD video that can be recorded on the camera if you want
I started out with a WiFi setup from Amazon. It was ok(and sometimes failed intermittently) so I went with the hard-wired NavTool. Sure, it’s a bit more involved to install, but not only can you add 4 different views, you can mirror your smartphone too. ...which really IS superior to Apple Car Play IMO.