8CH 1080P HD-TVI DVR/4pcs 1080P HD Weatherproof camera - Get a sharp and crisp image day or night with the camera's automatic IR-cut filter. Up to 100ft night vision. Aluminum weatherproof housing, cameras can be used indoors and outdoors Expandable Camera System - This 8channel 4-in-1 DVR which supports Analog, HD-TVI, CVI ,AHD Camera. it provides you the flexibility to extend additional cameras.You can add more 4pcs 720P or 1080P cameras. Customizable motion detection zone and Alerts - Be notified when there are unexpected movements. Smart notifications with image will be pushed to your smartphone via iPhone/Android App. You also can setup the Detection zone from your DVR to minimize false alarms. View from anywhere anytime - The free app ZOSI VIEW lets you see all of your cameras in one place. Check in on your home or business wherever you have an internet connection. Free App for Live View & Playback on Smart Devices with WiFi or 2G/3G/4G Anywhere Anytime. Smart Phone Support: iPhone, Android ,Ipad. No Include Hard Drive - This system does not come with hard drive. Assembling a 3.5 inch SATA 500GB to 2TB hard drive is necessary. DVR can be set to automatically overwrite the oldest internally stored footage or you can transfer those video files by USB to a memory stick or external hard drive. Mounting type: Surface ZOSI Security Camera System