NVR Wireless Night Vision High Definition Recorder Residental SmartSF 8CH 1080P HD CCTV Wireless Security System with 1TB Hard Drive WiFi NVR Kit and (4) 2.0MP Megapixel Wireless Indoor Outdoor Bullet IP Cameras P2P 65ft Night Vision 1080P(1920×1080) HD Network IP Camera,1/3 Aptina Sonser.NVR built-in two wifi antennas, the wireless can cover 1000ft in open area, up to 200ft with obstacles(one wall). Please note the system is NOT battery operated. NVR and cameras need to be plugged into nearby power. The 1080P NVR will automatically pairs the camera wirelessly. Just connect the camera to the NVR with the internet. But the camera is without a battery.Each camera needs to be plugged into a nearby outlet for power.True plug and play setup. Even a beginner can install it in a matter of minutes. It is suitable for homes, offices, shops, hotels, etc. Instead of getting just pictures when motion is detected, you will receive motion video clips in app. It also allows you to customize motion detection area and schedule time for notifications so that you can focus on things that are truly important! Video footage is saved to the hard disk, allowing you to playback both locally on your monitors or remotely on your smart devices.