Recommend Borescope for iphone etc, see cylinder walls

[WobblyElvis]

Can anyone recommend and borescope tool that is used with an iphone or android device that I can see cylinder walls with? It would have to fit through a spark plug hole and take a wide angle view. I'm looking for wear on the cylinder walls due to piston slap. Could be wireless or not.
Thank you.

 

[supton]

Previous thread recommended this one, I have not ordered it yet but I've kept the link open in my browser as a temptation.

 

[caprice_2nv]

That's much cheaper than I expected. I look forward to feedback if you get it.

 

[demarpaint]

I have this one: FOXWELL Wi-Fi BORESCOPE It is very good. I paid less so shop around.

 

[Trav]

I have the same one, the longer batter battery life was a deciding factor. Its works well.