A:AnswerI haven't taken mine to a hotel. but I went to my son's house and connected to his wireless and was able to view the camera. Also, you can see your camera online via mydlink website.
A:AnswerIf you intend to point the camera at the oil gauge so you can look at it, to me, that would be no different than pointing the camera at a car from inside your house. It is a very easy setup.
A:AnswerThis system doesn't record at ALL, it is a real time system, you have to watch and maybe take photos of what you see. But it does have sound, no recording capabilities.
A:AnswerOnce you set the camera up as wireless, it will work as far as the capability of your wireless connection. My camera is about 50 feet away from my router and haven't tried it any further so far.
A:AnswerYou don't need the ethernet cable aside from using it to connect it to your Wi-Fi. If your wireless router supports WPS you don't even need it for that. You just press the WPS button on the camera and router at the same time and the camera will automatically join the WiFi network. No "setup".