No, this camera does not support wifi connection. 

Yes, you can use 4 or 8 rechargeable AA batteries as backup. 

You can view photos and videos from this WiFi trail camera without removing it from the mount. And you can set the camera in the APP. This is very useful for cameras mounted in high places or hard-to-reach places. 

Hello, this trail camera can provide 4K video and 30MP photo. It's clear enough to see what you're shooting with this hunting camera. So you get clear images even in the dark. More importantly, this hunting camera has WiFi connection and APP control. That means you can use the APP to preview and download photos on your phone. It's so convenient. 

1.If the camera's current Wi-Fi and the Wi-Fi you want to switch can be connected at the same time, you can switch Wi-Fi directly by selecting Wi-Fi network in the settings interface. 2.When the camera is disconnected from the current WiFi, the app will show "Device disconnected". Click Troubleshoot to connect directly to a different wireless network. Or remove the camera from Tuya Smart and then connect the camera to the Wi-Fi you want to switch to.