I'm hoping the good people of The Dug-Out can help me out.

We leave our dogs in the car if, for example, we go for dinner or visit someone who isn't keen on them being in their house.

The Mrs is asking if we can get a battery powered wireless camera that I can leave in the car and then view from my phone if the car is out of sight so I know they're ok but I'm wondering if that is even possible? The ones I have seen so far all require a wifi connection and are designed to be left in the house.

Dash cams all seem to be wired and I don't think you can view them live from your phone.

Anyone have any ideas or is this impossible?

I'm a bit useless when it comes to these things!

Many thanks in advance.