JOOAN Security Camera System Wireless with 4 X 1080P IP Cameras and 4CH NVR Wireless Security CCTV Surveillance Systems Plug and Play Indoor/Outdoor- No HDD(no Hard Drive) Security camera system Wireless, Really Plug & Play, simple installation,but NOTE: This is NOT Battery Powered Cameras, Wireless Camera System Doesnt Mean You can Use it without Any Cables- still Needed to Power on the Cameras and NVR by Stable Power from nearby Outlets (JOOAN doesn't Take Charge of Installation) WiFi IP Camera: Truely 4 x 1080P (1920*1080) HD IP cameras are exceptionally smooth, night vision is up to 100ft in the dark with IR-CUT double filter lens; with weatherproof IP66 level and special heat dissipation system and metal case.(ATTENTION: the camera built-in WiFi module, powered by the adapter(in the package) from the nearby outlet) 4 Channel NVR( no hard drive):NVR built-in router ensures stable WiFi connection. Plug power and Play,no need complex wiring; Intuitive interface, convenient installation and easy remote control, with AUTO-PAIR technology; TIPS: NO HARD DRIVE(support 500GB-6T SATA 3.5" HDD (recommended WD purple HDD)) Remote Viewing Anywhere Anytime. You can view the cameras remotely on your smart phone, ipad or PC anywhere anytime once the system is set up; Motion Detection: this system support customized motion detection setting, 24/7 working, guard your home and business. welcome to view the operation video: https://www.youtube.com/watch?v=6CmmR_jgndM&t; We offer 1-month return, 1-YEAR WARRANTY and lifetime free technical support. Any problem or suggestion pls do not hesitate to contact us firstly. (email: technicalreply@qacctv.com; Skype: market@qacctv.com) Thank you!