This is a wired system, not wireless. This system comes with 1TB pre-installed Hard Drive(can view and record). Complete system do not need Internet to work. However, an Internet will be necessary if you wish to use mobile for remote view. Get a sharp and crisp image day or night with the camera’s automatic IR-CUT filter Up to 120ft night vision vision. Aluminum weatherproof housing cameras can be Used indoors and outdoors. Indoor and Outdoor Use. Solid metal housing provides the camera with better protection while being easier to dissipate heat for extended life span. Upgraded 5MP Lite DVR. Upgraded 5MP Lite DVR can work with 2MP and 5MP 12.5fps TVI, CVI, AHD cameras. It supports up to 5MP video input, allowing clearer and sharper viewing experience. Never miss any key monents with this 24/7 recording camera kit. 265+ technology saves about 50% bandwidth and storage compared with H. Enjoy sharper and smoother viewing with H. Security camera System detects movement and send instant emails, App push notifications and buzzer sound alerts to you. Set motion detection, sechedule or 24/7 recording for each camera respectively to meet your recording needs. Check in on your home or business wherever you have an internet connection. You can Live View & Playback on Smart Devices(IOS/Android) with WiFi or 2G/3G/4G Anywhere Anytime.