【All-in-1 Plug-N-Play 8 Camera Kit】This is a prepackaged camera set with 8 security cameras in 4, a 16-channel 4K expandable NVR and needed accessories. The standalone surveillance system works instantly out of box. You only need to plug the NVR to a screen and plug the cameras to power to start monitoring your properties. | 【2 Cameras in 1】The 2-in-1 camera has a stationary camera and a PTZ tracking camera. The 2 cameras let you monitor and record 2 sides with 2 pictures simultaneously. 4 cameras enable you to see & record 8 views of different directions, with the cost of 4 cameras only. | 【Standalone NVR with WiFi Routers inside】The 16CH 4K WiFi NVR is standalone with its own Linux Operating System and its own dual WiFi routers inside. All cameras connect to the NVR's own WiFi and they work as a CCTV system even you don't have Internet service. The cameras do not use your home WiFi bandwidth and is hassle-free to home network. The secondary WiFi lets you connect the NVR to Internet, just like how you use an iPad. The 16CH NVR lets you add 12 extra cameras if needed. | 【AI Auto Tracking】You can control the PTZ camera to move horizontally and vertivally to see every directions. You can also let the camera do it automatically with the AI Auto Tracking. It follows people, animals or vehicles and records activities. | 【Easy Remote View】Regardless how many cameras you have, you only need to scan a QR code to add the NVR to the free XMARTO phone Apps. Then you can view all cameras with a single tap on a smartphone, from anywhere anytime. The camera system can also be viewed from tablets, PC, Mac and Alexa. | 【Long Range WiFi 6 for Easy Installation】Evolved to latest WiFi 6 technology, on open ground the XMARTO WiFi cameras can be installed up to 1300ft (400m) away from the NVR. In actual houses with walls & interferences, you can still mount the cameras a few hundred feet away. This makes it possible to use the cameras wirelessly and | 【No Monthly Fee】With a 1TB surveillance HDD preinstalled, the NVR has enough storage to keep videos of past months. The security system are permanently free to use. | 【24/7 WiFi Camera with 5G Dual Band】You don't have to run cable to install the camera. It only requires power from a nearby outlet and connect to the NVR's WiFi. With the plug-in power, the camera monitor and records 24/7, bringing peace of mind to owners. | 【2-way Audio & Siren Alarm】While watching the 2K HD video, you can hear voice and hold to talk. You have the quick button to tap and sound a siren alarm if you want someone away, without the necessity of confrontation. | 【Infrared & Floodlight 2-in-1】The 7 professional LED lights on each camera integrated both infrared and floodlights. You can set each camera to invisiable infrared lights with black & white night vision, or visiable flood lights with color night vision.