xmartO 3MP WiFi Home Security Camera with Built-in Microphone (WB2024-W-P2 add-on Camera with 3.6mm Lens and 2K HD Resolution, Pack of 2, Works only for NVRs Version 3.0 or Later)3MP Add on Security Camera for Home Surveillance Camera System overview: xmartO 3MP2304*1296wireless security camera, compatible with xmartO Security Camera System as expandable add on camera or replacement camera. Note: This camera does not work individually. It requires NVR to work. This 3MP camera can only support NVR's fimware with 3. 0 and later versions. This camera is with RJ45 port, Here is the way of Adding a New Camera to your exsisting