A DVR Camera is a hidden camera that records locally to a Micro SD card or onto the camera's internal memory. You can then place the SD card into your computer to view the video. These cameras are not able to be viewed remotely like Wi-Fi cameras. Some of the below devices have "P2P Wi-FI" which is proximity based like a hotspot. They will function as long as you are no more than about 70 feet away from the device.