1) DC12V Power Plug-in & Easy Setup, Wireless means camera and NVR is wireless connection, camera（No battery ） and NVR still need work with power cable. The wireless video security system is easy to setup and DIY installation (need DC 12V plug power supply), these WIFI cameras are paired with NVR at manufacturing site. Connect PC/TV monitor to NVR by a VGA/HDMI cable. Finally power on and serve yourself with 24/7 surveillance, true plug and play. 2）Preinstalled 1TB Hard Drive & Cloud Storage，1Tb Hard Drive Pre-installed support 24 hours More than 45 days reliable video recording. 4 cameras can store 24 hours recording about 30 days. Cloud Storage is not free, as per your own needs choose the better choice. 3) Stunning 2K Ultra HD video & One Way Audio, 3.0MP presents 2304*1296 Mega Pixels about 1.5 times clearer than 1080P. Camera with 3 array Infrared LED allows you to see up to 65ft night vision even in darkness. Employing IP66 Waterproof metal material housing, cameras can be used indoor and outdoor. Outdoor security camera system also allows you to see and listen to people on your property remotely. 4) H.265+ Video Compression, Compared with H.264, H.265+ is able to double data compression ratio, while improve video quality with low bit-rate, It enables IP camera to deliver smooth HD video with low bandwidth, in turn, reducing the Network bandwidth and save up to 50% video storage space. 5) AI Human Detection, Reduces false alarms -- Compared with the traditional motion detection alert, our 3MP camera adopt more advanced AI human detection technology in 2021. Advanced AI technology for home security camera systems distinguishes humans from animals or objects within the monitoring range reducing false alarms. When an intruder enters the monitoring range, the screen will display the human frame will be triggered. 7）Dual WIFI NVR for you &8CH NVR，Dual WIFI NVR support 2 ways to connect with network: connect with network by Ethernet cable or connect with 2.4Ghz WIFI network. Expandable 8ch NVR allow to operate 8pcs cameras at most, we sell various types of cameras meet all your needs. 8) Remotely Anytime & Anywhere and No Monthly Fee, our wireless security camera system can work without network. Internet is only necessary when remote access from phone or computer. It allows to view the live video remotely anytime and anywhere by phone or computer(Available for Android & IOS system). We are providing free mobile APP "EseeCloud" (iOS & Android) and PC Client. No additional cost to download APP. Windows and MAC computer software : EseeCloud(Please E-mail to us).